Rays Aiims Exam 2016
200 Questions
| Attempts: 366
.
Questions and Answers
- 1.
A vernier callipers is used to measure the length of a cylinder. 10 divisions of the Vernier scale coincides with 9 divisions of the main scale. The best suited length (measured ) is
- A.
9.713 cm
- B.
9.97 cm
- C.
9.01 cm
- D.
9.01 mm
Correct Answer
C. 9.01 cm -
- 2.
The number of significant digits that may be present in a value recorded using a millimeter graduated meter scale is
- A.
1
- B.
2
- C.
3
- D.
1,2,3 or 4
Correct Answer
A. 1 -
- 3.
With increase in temperature, the viscosity of
- A.
Both gases and liquids increases
- B.
Both gases and liquids decreases
- C.
gases increases and of liquids decreases
- D.
gases decreases and of liquids increases
Correct Answer
A. Both gases and liquids increases -
- 4.
Terminal velocity of water drops depends upon the
- A.
Radius of drop
- B.
Charge of drop
- C.
Temperature of drop
- D.
Velocity of light
Correct Answer
A. Radius of drop -
- 5.
In a machine is lubricated with oil
- A.
The mechanical advantage of the machine increases
- B.
The mechanical efficiency of the machine increases
- C.
Both its mechanical advantage and efficiency increase
- D.
Its efficiency increase, but its mechanical advantage decreases.
Correct Answer
A. The mechanical advantage of the machine increases -
- 6.
A student’s life was saved in an automobile accident because an air bag expanded in front of his head. If the car had not been equipped with an air bag, the windshield would have stopped the motion of his head in a much shorter time. Compared to the windshield, the air bag
- A.
Exerts a much smaller impulse
- B.
causes a much smaller change in kinetic energy
- C.
exerts a much smaller force
- D.
does much more work
Correct Answer
C. exerts a much smaller force -
- 7.
A box weighing 100 N is at rest on a horizontal floor. The coefficient of static friction between the box and the floor is 0.4. What is the smallest force F exerted eastward and upward at an angle of 30o with the horizontal that can start the box in motion?
- A.
27.5 N
- B.
37.5 N
- C.
14.2 N
- D.
45.4 N
Correct Answer
B. 37.5 N -
- 8.
A bowling ball is tied to a rope such that the rope lifts the ball straight up at a constant velocity. The magnitude of the tension in the rope is
- A.
Greater than the force of gravity on the ball
- B.
Equal to the net force acting on the ball
- C.
Less than the force of gravity on the ball
- D.
Equal to the force of gravity on the ball
Correct Answer
D. Equal to the force of gravity on the ball -
- 9.
The ratio of angular momentum of earth for its orbital motion and its daily rotation is
- A.
Much greater than 1
- B.
Smaller than 1
- C.
Equal to 1
- D.
Slightly greater than 1
Correct Answer
A. Much greater than 1 -
- 10.
A particle undergoes uniform circular motion. About which point on the plane of the circle, will the angular momentum of the particle remain conserved?
- A.
Centre of the circle
- B.
On the circumference of the circle
- C.
Inside the circle
- D.
Outside the circle
Correct Answer
A. Centre of the circle -
- 11.
The depth from the surface of the earth of radius R at which the acceleration due to gravity will be 75 % of the value on the surface of the earth is
- A.
R/4
- B.
R/2
- C.
3R/4
- D.
R/8
Correct Answer
A. R/4 -
- 12.
A space ship moves from earth to moon and back. the greatest energy required for the space ship is to overcome the difficulty in
- A.
Entering the earth’s gravitational field
- B.
Take off from earth’s field
- C.
Take off from lunar surface
- D.
Entering the moon’s lunar surface
Correct Answer
C. Take off from lunar surface -
- 13.
The true weight of an object in a geostationary satellite whose weight at N pole is 10 N is
- A.
zero
- B.
10 N
- C.
2.3 N
- D.
0.23 N
Correct Answer
D. 0.23 N -
- 14.
If the radius of the earth decreases by 10 %, the mass remaining unchanged, the acceleration due to gravity will
- A.
Increase by 18 %
- B.
Decrease by 18 %
- C.
Increase by more than 18 %
- D.
Decrease by more than 18%
Correct Answer
A. Increase by 18 % -
- 15.
A mass m attached to a spring oscillates with a period of 3s. If the mass is increased by 1kg the period increases by 1s. The initial mass m in kg is
- A.
7/9
- B.
9/7
- C.
14/9
- D.
18/7
Correct Answer
A. 7/9 -
- 16.
A vertical mass-spring system executes simple harmonic oscillations with a period of 2s. The quantity of this system which exhibits simple harmonic variation with a period of 1s is
- A.
velocity
- B.
Potential energy
- C.
Phase difference between acceleration and displacement
- D.
Difference between kinetic energy and potential energy
Correct Answer
B. Potential energy -
- 17.
Two identical springs of constant K are connected in series and parallel. A mass M is suspended from them. The ratio of their frequencies of vertical oscillations will be
- A.
2:1
- B.
1:2
- C.
1:4
- D.
4:1
Correct Answer
B. 1:2 -
- 18.
A potential difference is applied across the ends of a metallic wire. If the potential difference is doubled, the drift velocity
- A.
Will be doubled
- B.
Will be halved
- C.
Will be quadrupled
- D.
Will remain unchanged
Correct Answer
A. Will be doubled -
- 19.
In thermocouple, the temperature of the cold junction is 10oC. The temperature of inversion is 510oC. The neutral temperature of the thermocouple is
- A.
255 oC
- B.
260 oC
- C.
265 oC
- D.
250 oC
Correct Answer
B. 260 oC -
- 20.
The electric current passing through a metallic wire produces heat because of
- A.
Collisions of conduction electrons with each other
- B.
Collisions of the atoms of the metal with each other
- C.
The energy released in the ionization of the atoms of the metal
- D.
Collisions of the conduction electrons with the atoms of the metallic wire
Correct Answer
D. Collisions of the conduction electrons with the atoms of the metallic wire -
- 21.
In an orbital motion, the angular momentum vector is
- A.
along the radius vector
- B.
parallel to the linear momentum
- C.
in the orbital plane
- D.
perpendicular to the orbital plane
Correct Answer
D. perpendicular to the orbital plane -
- 22.
Consider an n-p-n transistor amplifier in common emitter configuration. The current gain of the transistor is 100. If the collector currents changes by 1 mA, what will be the change in emitter current?
- A.
1.1 mA
- B.
1.01 mA
- C.
0.01 mA
- D.
10 mA
Correct Answer
B. 1.01 mA -
- 23.
A parachutist after bailing out falls 50 m without friction. When parachute opens, it decelerate at 2ms-2. He reaches the ground with a speed of 3 ms-1. At what height, did he bail out
- A.
91 m
- B.
182 m
- C.
293 m
- D.
111 m
Correct Answer
C. 293 m -
- 24.
The mutual inductance of an inductance coil is 5 Henry. In the primary coil the current reduces from 5A to zero in 10-3s . What is the induced emf in the secondary coil?
- A.
2500V
- B.
25000V
- C.
2510V
- D.
zero
Correct Answer
B. 25000V -
- 25.
In each of the following questions a statement of Assertion is given followed by corresponding statement of Reason just below it. Of the statements mark the correct answer as A) If both Assertion and reason are true the reason is the correct explanation of the Assertion B) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion C) If Assertion is true but Reason is false D) If both Assertion and Reason are false E) The Assertion is false but the reason is trueAssertion : The number of electrons in a p-type silicon semiconductor is less than the number of electrons in a pure silicon semiconductor at room temperature.Reason : It is due to law of mass action
- A.
A
- B.
B
- C.
C
- D.
D
- E.
E
Correct Answer
A. A -
- 26.
In each of the following questions a statement of Assertion is given followed by corresponding statement of Reason just below it. Of the statements mark the correct answer as A) If both Assertion and reason are true the reason is the correct explanation of the Assertion B) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion C) If Assertion is true but Reason is false D) If both Assertion and Reason are false E) The Assertion is false but the reason is trueAssertion : Woolen clothes keep the body warm in winterReason : Air is a bad conductor of heat.
- A.
A
- B.
B
- C.
C
- D.
D
- E.
E
Correct Answer
D. D -
- 27.
In each of the following questions a statement of Assertion is given followed by corresponding statement of Reason just below it. Of the statements mark the correct answer as A) If both Assertion and reason are true the reason is the correct explanation of the Assertion B) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion C) If Assertion is true but Reason is false D) If both Assertion and Reason are false E) The Assertion is false but the reason is trueAssertion : Coefficient of absorption of radiation of a ideal black body is 1.Reason : An ideal black body emits radiations of all wavelengths.
- A.
A
- B.
B
- C.
C
- D.
D
- E.
E
Correct Answer
B. B -
- 28.
In each of the following questions a statement of Assertion is given followed by corresponding statement of Reason just below it. Of the statements mark the correct answer as A) If both Assertion and reason are true the reason is the correct explanation of the Assertion B) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion C) If Assertion is true but Reason is false D) If both Assertion and Reason are false E) The Assertion is false but the reason is trueAssertion : A needle placed carefully on the surface of water may float, where as the ball of the same material will always sink.Reason : The buoyancy of an object depends both on the material and shape of the object.
- A.
A
- B.
B
- C.
C
- D.
D
- E.
E
Correct Answer
C. C -
- 29.
In each of the following questions a statement of Assertion is given followed by corresponding statement of Reason just below it. Of the statements mark the correct answer as A) If both Assertion and reason are true the reason is the correct explanation of the Assertion B) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion C) If Assertion is true but Reason is false D) If both Assertion and Reason are false E) The Assertion is false but the reason is trueAssertion : A transformer cannot work on DC supplyReason : DC changes neither in magnitude nor in direction
- A.
A
- B.
B
- C.
C
- D.
D
- E.
E
Correct Answer
A. A -
- 30.
In each of the following questions a statement of Assertion is given followed by corresponding statement of Reason just below it. Of the statements mark the correct answer as A) If both Assertion and reason are true the reason is the correct explanation of the Assertion B) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion C) If Assertion is true but Reason is false D) If both Assertion and Reason are false E) The Assertion is false but the reason is trueAssertion : If the bob of a simple pendulum is kept in a horizontal electric field, its period of oscillation will remain same Reason : If bob is charged and kept in horizontal electric field, then the time period will be decreased
- A.
A
- B.
B
- C.
C
- D.
D
- E.
E
Correct Answer
B. B -
- 31.
In each of the following questions a statement of Assertion is given followed by corresponding statement of Reason just below it. Of the statements mark the correct answer as A) If both Assertion and reason are true the reason is the correct explanation of the Assertion B) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion C) If Assertion is true but Reason is false D) If both Assertion and Reason are false E) The Assertion is false but the reason is trueAssertion : The earth is slowing down and as a result the moon is coming nearer to it.Reason: The angular momentum of the earth moon system is not conserved.
- A.
A
- B.
B
- C.
C
- D.
D
- E.
E
Correct Answer
C. C -
- 32.
In each of the following questions a statement of Assertion is given followed by corresponding statement of Reason just below it. Of the statements mark the correct answer as A) If both Assertion and reason are true the reason is the correct explanation of the Assertion B) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion C) If Assertion is true but Reason is false D) If both Assertion and Reason are false E) The Assertion is false but the reason is trueAssertion : The driver in a vehicle moving with a constant speed on a straight road is in a non-inertial frame of reference. Reason: A reference frame in which Newton’s laws of motion are applicable is non-inertial
- A.
A
- B.
B
- C.
C
- D.
D
- E.
E
Correct Answer
C. C -
- 33.
In each of the following questions a statement of Assertion is given followed by corresponding statement of Reason just below it. Of the statements mark the correct answer as A) If both Assertion and reason are true the reason is the correct explanation of the Assertion B) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion C) If Assertion is true but Reason is false D) If both Assertion and Reason are false E) The Assertion is false but the reason is trueAssertion : A small drop of mercury is spherical but bigger drops are oval in shape.Reason : Surface tension of liquid decreases with increase in temperature.
- A.
A
- B.
B
- C.
C
- D.
D
- E.
E
Correct Answer
B. B -
- 34.
In each of the following questions a statement of Assertion is given followed by corresponding statement of Reason just below it. Of the statements mark the correct answer as A) If both Assertion and reason are true the reason is the correct explanation of the Assertion B) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion C) If Assertion is true but Reason is false D) If both Assertion and Reason are false E) The Assertion is false but the reason is trueAssertion : In the phenomenon of mutual induction, self-induction of each of the coil persistsReason: A self –induction arises when strength of current in one coil changes. In mutual induction current is changing in both the individual coils
- A.
A
- B.
B
- C.
C
- D.
D
- E.
E
Correct Answer
B. B -
- 35.
In each of the following questions a statement of Assertion is given followed by corresponding statement of Reason just below it. Of the statements mark the correct answer as A) If both Assertion and reason are true the reason is the correct explanation of the Assertion B) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion C) If Assertion is true but Reason is false D) If both Assertion and Reason are false E) The Assertion is false but the reason is trueAssertion : In the phenomenon of mutual induction, self-induction of each of the coil persistsReason: A self –induction arises when strength of current in one coil changes. In mutual induction current is changing in both the individual coils
- A.
A
- B.
B
- C.
C
- D.
D
- E.
E
Correct Answer
A. A -
- 36.
In each of the following questions a statement of Assertion is given followed by corresponding statement of Reason just below it. Of the statements mark the correct answer as A) If both Assertion and reason are true the reason is the correct explanation of the Assertion B) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion C) If Assertion is true but Reason is false D) If both Assertion and Reason are false E) The Assertion is false but the reason is trueAssertion : If bodies slide down on a smooth inclined plane without rolling then all bodies reach the bottom simultaneouslyReason : Acceleration of all bodies are equal and independent of the shape
- A.
A
- B.
B
- C.
C
- D.
D
- E.
E
Correct Answer
A. A -
- 37.
In each of the following questions a statement of Assertion is given followed by corresponding statement of Reason just below it. Of the statements mark the correct answer as A) If both Assertion and reason are true the reason is the correct explanation of the Assertion B) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion C) If Assertion is true but Reason is false D) If both Assertion and Reason are false E) The Assertion is false but the reason is trueAssertion : In an elastic collision in one dimension between two bodies, total momentum remains the same before, during and after the collisionReason: In an elastic collision in one – dimension between two bodies, total kinetic energy remains the same before, during and after the collision. [Assume external forces are absent in both the above statements)
- A.
A
- B.
B
- C.
C
- D.
D
- E.
E
Correct Answer
C. C -
- 38.
In each of the following questions a statement of Assertion is given followed by corresponding statement of Reason just below it. Of the statements mark the correct answer as A) If both Assertion and reason are true the reason is the correct explanation of the Assertion B) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion C) If Assertion is true but Reason is false D) If both Assertion and Reason are false E) The Assertion is false but the reason is trueAssertion: Some work ( non zero) has to be done on a moving particle to change its momentum.Reason: To change momentum of a particle a non-zero net force should act on it
- A.
A
- B.
B
- C.
C
- D.
D
Correct Answer
D. D -
- 39.
In each of the following questions a statement of Assertion is given followed by corresponding statement of Reason just below it. Of the statements mark the correct answer as A) If both Assertion and reason are true the reason is the correct explanation of the Assertion B) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion C) If Assertion is true but Reason is false D) If both Assertion and Reason are false E) The Assertion is false but the reason is trueAssertion: A rocket moves forward by pushing eh surrounding air backwardsReason: It derives the necessary thrust to move forward according to Newton’s third law of motion.
- A.
A
- B.
B
- C.
C
- D.
D
Correct Answer
A. A -
- 40.
In each of the following questions a statement of Assertion is given followed by corresponding statement of Reason just below it. Of the statements mark the correct answer as A) If both Assertion and reason are true the reason is the correct explanation of the Assertion B) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion C) If Assertion is true but Reason is false D) If both Assertion and Reason are false E) The Assertion is false but the reason is trueAssertion: Use of ball bearings between two moving parts of a machine is a common practiceReason: Ball bearings reduce vibrations and provide good stability
- A.
A
- B.
B
- C.
C
- D.
D
Correct Answer
C. C -
- 41.
In each of the following questions a statement of Assertion is given followed by corresponding statement of Reason just below it. Of the statements mark the correct answer as A) If both Assertion and reason are true the reason is the correct explanation of the Assertion B) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion C) If Assertion is true but Reason is false D) If both Assertion and Reason are false E) The Assertion is false but the reason is trueAssertion: A man in a closed cabin falling freely does not experience gravity.Reason: Inertial and gravitational mass shave equivalence
- A.
A
- B.
B
- C.
C
- D.
D
Correct Answer
A. A -
- 42.
In each of the following questions a statement of Assertion is given followed by corresponding statement of Reason just below it. Of the statements mark the correct answer as A) If both Assertion and reason are true the reason is the correct explanation of the Assertion B) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion C) If Assertion is true but Reason is false D) If both Assertion and Reason are false E) The Assertion is false but the reason is trueAssertion: If we assume that there only two bodies, earth and sun, in the universe. Their size, shape and motion remains same. A frame placed on sun is an inertial frame.Reason: Inertial frame is non-accelerating in mature.
- A.
A
- B.
B
- C.
C
- D.
D
Correct Answer
D. D -
- 43.
In each of the following questions a statement of Assertion is given followed by corresponding statement of Reason just below it. Of the statements mark the correct answer as A) If both Assertion and reason are true the reason is the correct explanation of the Assertion B) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion C) If Assertion is true but Reason is false D) If both Assertion and Reason are false E) The Assertion is false but the reason is trueAssertion: An iron ball and a wooden ball are both released at the same height. In the presence of a medium both the balls reach the ground with different velocities and different times.Reason: Both the ball reach the ground simultaneously.
- A.
A
- B.
B
- C.
C
- D.
D
Correct Answer
C. C -
- 44.
In each of the following questions a statement of Assertion is given followed by corresponding statement of Reason just below it. Of the statements mark the correct answer as A) If both Assertion and reason are true the reason is the correct explanation of the Assertion B) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion C) If Assertion is true but Reason is false D) If both Assertion and Reason are false E) The Assertion is false but the reason is trueAssertion: Least count of all screw based instruments is same.Reason: Least count for all screw based instruments are found using the ratio pitch per division of circular scale.
- A.
A
- B.
B
- C.
C
- D.
D
Correct Answer
D. D -
- 45.
In each of the following questions a statement of Assertion is given followed by corresponding statement of Reason just below it. Of the statements mark the correct answer as A) If both Assertion and reason are true the reason is the correct explanation of the Assertion B) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion C) If Assertion is true but Reason is false D) If both Assertion and Reason are false E) The Assertion is false but the reason is trueAssertion: A particle starts from rest under action of (nonzero) variable acceleration such that direction of acceleration is always fixed ( or constant). Then this particle moves in a straight line.Reason: The motion of particle starting from rest is always along a straight line.
- A.
A
- B.
B
- C.
C
- D.
D
Correct Answer
C. C -
- 46.
If A is the areal velocity of a planet of mass M, its angular momentum is
- A.
M/A
- B.
2MA
- C.
A2M
- D.
2AM2
Correct Answer
B. 2MA -
- 47.
A mass M is suspended from a spring of negligible mass. The spring is pulled a little and then released so that the mass executes simple harmonic oscillation with a time period T. If the mass is increased by m, then the time period becomes (5/4)T. The ratio of m/M is
- A.
9/16
- B.
25/16
- C.
4/5
- D.
5/4
Correct Answer
A. 9/16 -
- 48.
The breaking stress of a wire depends on
- A.
Material of the wire a) material of the wire a) material of the wire
- B.
Length of the wire
- C.
Radius of the wire
- D.
None of these
Correct Answer
A. Material of the wire a) material of the wire a) material of the wire -
- 49.
A body of mass 0.5 kg is attached to a thread and it just floats in a liquid. The tension in the thread is
- A.
0.5 kg wt
- B.
More than 0.5 kg wt
- C.
Less than 0.5 kg wt
- D.
Zero
Correct Answer
D. Zero -
- 50.
A stone is dropped from a balloon ascending with 2 m/s from a height 4.8 m. The time of flight of the stone is (g = 10 m/s2)
- A.
1.2 sec
- B.
1.6 sec
- C.
2.0 sec
- D.
2.4 sec
Correct Answer
A. 1.2 sec -
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Mar 20, 2022Quiz Edited by
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May 22, 2016Quiz Created by
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