Physics Toughest Trivia Exam: Quiz!
50 Questions
| Attempts: 53
(489).jpg "Physics Toughest Trivia Exam: Quiz! - Quiz")
.
Questions and Answers
- 1.
Rockets were first used as
- A.
Ceremonial fireworks
- B.
A form of transportation
- C.
Instruments of war
- D.
Hunting tools
Correct Answer
A. Ceremonial fireworks -
- 2.
Which one of the following is not one of the three distinct elements that work together to make satellite (SATCOM) possible?
- A.
Payload segment
- B.
Control segment
- C.
Ground control
- D.
Space segment
Correct Answer
A. Payload segment -
- 3.
Which one of the following is not a function of the (SATCOM) control segment?
- A.
Ground control
- B.
Payload control
- C.
Network control
- D.
Spacecraft control
Correct Answer
B. Payload control -
- 4.
Which of the following is/are semiconductor(s)?
- A.
Silicon
- B.
Copper
- C.
Iron
- D.
Germanium
Correct Answer(s)
A. Silicon
D. Germanium -
- 5.
Which one of the following phenomena is called the photoelectric effect?
- A.
High energy electrons impinge on a metallic anode which then emits photons.
- B.
A high energy photon emits photons as it is slowed down.
- C.
A metal absorbs quanta of light and then emits electrons.
- D.
Two electrons are created from a quantum of light.
Correct Answer
C. A metal absorbs quanta of light and then emits electrons. -
- 6.
Which of the following statement about X-rays is/are correct?
- A.
X-rays do not consist of electrically charged particles.
- B.
X-rays has the same frequency with radio waves.
- C.
X-rays are not deflected in an electric or magnetic field.
- D.
The wave length of X-rays is longer than that of light.
Correct Answer(s)
A. X-rays do not consist of electrically charged particles.
C. X-rays are not deflected in an electric or magnetic field. -
- 7.
The phenomenon of radioactivity was first discovered by:
- A.
Marie Curie
- B.
Sir J.J. Thompson
- C.
Neils Bohr
- D.
Henri Becquerel
Correct Answer
D. Henri Becquerel -
- 8.
Two radioactive elements P and Q have half-lives of 10 and 20 minutes respectively. If they started off with the same number of atoms, what is the ratio of the number of remaining atoms of P to that of Q after 80 minutes?
- A.
8:1
- B.
1:16
- C.
16:1
- D.
1:8
Correct Answer
B. 1:16 -
- 9.
Which of the following names is not associated with models of the atom?
- A.
Isaac Newton
- B.
Sir J.J. Thompson
- C.
Neils Bohr
- D.
Ernest Rutherford
Correct Answer
A. Isaac Newton -
- 10.
What is the peak value of an A.C. voltage whose r.m.s value is 100V?
- A.
140.00V
- B.
50.00V
- C.
70.70V
- D.
141.42V
Correct Answer
D. 141.42V -
- 11.
A transformer with 5500 turns in its primary is used between a 240V A.C. supply and a 120V kettle. Calculate the number of turns in the secondary.
- A.
460
- B.
11000
- C.
2750
- D.
232
Correct Answer
C. 2750 -
- 12.
The dimension of power is
- A.
ML2T-3
- B.
MLT-2
- C.
ML2T-2
- D.
ML-2T-3
Correct Answer
A. ML2T-3 -
- 13.
Two points on a velocity-time graph have coordinates (5s, 10ms-1) and (20s, 20ms-1). Calculate the mean acceleration between the two points
- A.
2.00ms-2
- B.
0.83ms-2
- C.
0.67ms-2
- D.
1.50ms-2
Correct Answer
C. 0.67ms-2 -
- 14.
An object is projected with a velocity of 100m/s from the ground level at an angle Ɵ to the vertical. If the total time of flight of the projectile is 10s, calculate Ɵ. (g = 10m/s2)
- A.
550
- B.
450
- C.
300
- D.
600
Correct Answer
D. 600 -
- 15.
An object of mass 5kg moves around a circle of radius 6m. If the period of the motion is πs, calculate the force towards the center.
- A.
75N
- B.
100N
- C.
120N
- D.
50N
Correct Answer
C. 120N -
- 16.
A force of 20N applied parallel to the surface of a horizontal table is just sufficient to make a block of mass 4kg move on the table. Calculate the coefficient of friction between the block and the table [g = 10m/s2].
- A.
1.0
- B.
0.5
- C.
2.0
- D.
20.0
Correct Answer
B. 0.5 -
- 17.
A simple pendulum has a period of 17.0s. when the length is shortened by 1.5m, its period is 8.5s. Calculate the original length of the pendulum.
- A.
2.0m
- B.
3.0m
- C.
4.0m
- D.
6.5m
Correct Answer
A. 2.0m -
- 18.
A constant force of magnitude F acts on an object of mass 0.04kg initially at rest at a point O. If the speed of the object when it has moved 50m from O is 500ms-1, what is the value of F?
- A.
100N
- B.
10N
- C.
1000N
- D.
55N
Correct Answer
A. 100N -
- 19.
A girl whose mass is 20kg climbs up 25 steps, each of height 15cm in 10 seconds. Calculate the power expended [g = 10m/s2]
- A.
7500W
- B.
750W
- C.
7.5W
- D.
75W
Correct Answer
D. 75W -
- 20.
Two objects of masses 80kg and 50kg are separated by a distance of 0.2m. If the gravitational constant is 6.6x10-11Nm2kg-2, calculate the gravitational attraction between them.
- A.
6.6 x 10-6N
- B.
6.8 x 10-6N
- C.
6.1 x 10-6N
- D.
1.3 x 10-6N
Correct Answer
A. 6.6 x 10-6N -
- 21.
A machine having a velocity ratio of 4 requires a weight of 20kg to overcome the weight of 60kg. The efficiency of the machine is
- A.
90%
- B.
60%
- C.
75%
- D.
331/3%
Correct Answer
C. 75% -
- 22.
An object is heated from 300C to 570C. What is the increase in its temperature on the Kelvin scale?
- A.
27K
- B.
100K
- C.
18K
- D.
300K
Correct Answer
D. 300K -
- 23.
The distance between the fixed points of a centigrade thermometer is 20cm. what is the temperature when the mercury level is 4.5cm above the lower mark?
- A.
100.00C
- B.
22.50C
- C.
29.00C
- D.
90.00C
Correct Answer
B. 22.50C -
- 24.
Metal rods of length 20m each are laid end to form a bridge at 250C. What gap will be provided between consecutive rails for the bridge to withstand 750C? [Linear expansivity of the material = 2.0 x10-5K-1]
- A.
0.20m
- B.
0.02m
- C.
0.25m
- D.
0.22m
Correct Answer
B. 0.02m -
- 25.
A tap supplies water at 250C while another supplies water at 750C. If a man wishes to bath with water at 400C, what is ration of the mass of hot water to that of cold water required?
- A.
3:7
- B.
1:3
- C.
3:1
- D.
15:8
Correct Answer
A. 3:7 -
- 26.
If water is gradually added to a few grains of table salt in a glass cup and left unstirred, the whole water will eventually taste salty. This is due to
- A.
Osmosis
- B.
Capillarity
- C.
Diffusion
- D.
Convection
Correct Answer
C. Diffusion -
- 27.
An electric charge can be transmitted through
- A.
Clay, paper and plastic
- B.
Rubber, wood and stone
- C.
Acid, cloth and glass
- D.
The human body, water and metals
Correct Answer
D. The human body, water and metals -
- 28.
The force acting on an electron carrying a charge of 1.6x10-19C in an electric field of intensity 5x108Vm-1 is
- A.
8.0x10-8N
- B.
3.1x1027N
- C.
8.0x10-11N
- D.
3.2x10-29N
Correct Answer
C. 8.0x10-11N -
- 29.
Ohm’s law states that the ratio V/I is constant for I. steel II. An electrolyte III. Silver IV. Diode
- A.
III and IV only
- B.
I and III only
- C.
I, II, III and IV
- D.
I and II only
Correct Answer
B. I and III only -
- 30.
A 4m long wire of cross-sectional area 2x10-8m2 has a resistance of 5Ω. The conductivity of the wire is
- A.
4.0x107Ω-1m-1
- B.
4.0x10-8Ω-1m-1
- C.
2.5x10-8Ω-1m-1
- D.
2.5x107Ω-1m-1
Correct Answer
A. 4.0x107Ω-1m-1 -
- 31.
A cell of emf 2V and internal resistance 0.5Ω delivers a current of 0.4A to an external resistance R. The value of R is
- A.
4.0Ω
- B.
1.0Ω
- C.
4.5Ω
- D.
0.5Ω
Correct Answer
C. 4.5Ω -
- 32.
A cell can supply currents of 0.4A and 0.2A through a 4.0Ω and 10.0Ω resistors respectively. The internal resistance of the cell is
- A.
1.5Ω
- B.
2.5Ω
- C.
1.0Ω
- D.
2.0Ω
Correct Answer
D. 2.0Ω -
- 33.
What is the cost of running five 50W lamps and four 100W lamps for 10 hours if electrical energy costs 2 kobo per kWh?
- A.
N0.13
- B.
N0.65
- C.
N39.00
- D.
N0.95
Correct Answer
A. N0.13 -
- 34.
In copper plating, a current of 0.5A is allowed for a cathode area of 100cm2. If this current is maintained constant for 100 minutes, the thickness of the copper deposited will approximately be [the electrochemical equivalent of copper = 0.0003g/C, density of copper = 104g/cm3]
- A.
10-4mm
- B.
10-2mm
- C.
10-3mm
- D.
10-5mm
Correct Answer
D. 10-5mm -
- 35.
In an electrolyte through which no current is passing,
- A.
The positive and negative ions move in opposite directions
- B.
The ions move randomly
- C.
There are no ions present
- D.
The ions remain at rest
Correct Answer
B. The ions move randomly -
- 36.
The force on a charge moving with velocity V in a magnetic field B is half of the maximum force when the angle between V and B is
- A.
900
- B.
450
- C.
300
- D.
00
Correct Answer
C. 300 -
- 37.
A galvanometer can be converted into an ammeter by connecting:
- A.
A low resistance shunt in parallel with the galvanometer
- B.
A low resistance shunt with the galvanometer
- C.
A high resistance multiplier in parallel with the galvanometer
- D.
A high resistance multiplier in series with the galvanometer
Correct Answer
A. A low resistance shunt in parallel with the galvanometer -
- 38.
The units of inductance and reactance are respectively
- A.
Farad and Henry
- B.
Henry and farad
- C.
Ohm and Henry
- D.
Henry and ohm
Correct Answer
D. Henry and ohm -
- 39.
If a force of 50N stretches a wire from 20m to 20.01m, what is the amount of force required to stretch the same material from 20m to 20.05m?
- A.
200N
- B.
250N
- C.
50N
- D.
100N
Correct Answer
B. 250N -
- 40.
A body weighing 10N in the air is partially immersed in water. It displaces water of mass 0.3kg. What is the upthrust on the body? (g=10m/s2)
- A.
5N
- B.
6N
- C.
8N
- D.
3N
Correct Answer
D. 3N -
- 41.
A tank of dimensions 3mx2mx1.5m is filled with water of density 1030kgm-3 and sealed. Neglecting the weight of the tank, the maximum pressure which the tank can maintain on the supporting surface is
- A.
3.1x104Nm-2
- B.
2.2x104Nm-2
- C.
6.5x104Nm-2
- D.
1.5x104Nm-2
Correct Answer
A. 3.1x104Nm-2 -
- 42.
A tank of capacity 27m3 initially filled with water is drained at the rate of 5kgs-1. If the density of water is 103kgm-3, the time it takes to empty the tank is
- A.
54min
- B.
90min
- C.
13.5min
- D.
135min
Correct Answer
B. 90min -
- 43.
A block of ice floats in water in a container. When the ice is completely melted, the water level in the container will
- A.
First rise and then fall
- B.
Rise
- C.
Fall
- D.
Remain the same
Correct Answer
D. Remain the same -
- 44.
A uniform meter rule AB is balanced on a knife-edge which is 55cm from B. if a mass of 10g is hung at P, which is 10cm from A. Calculate the mass of the meter rule.
- A.
50g
- B.
80g
- C.
70g
- D.
60g
Correct Answer
C. 70g -
- 45.
An air bubble of volume 4cm3 is formed 20m underwater. What will be its volume when it rises to just below the surface of the water if the atmospheric pressure is equivalent to a height of 10m of water?
- A.
4cm3
- B.
12cm3
- C.
6cm3
- D.
50cm3
Correct Answer
B. 12cm3 -
- 46.
Sixty complete waves pass a particular point in 4s. If the distance between three successive troughs of the waves is 15m, calculate the speed of the wave.
- A.
90.5ms-1
- B.
202.5ms-1
- C.
112.5ms-1
- D.
200.5ms-1
Correct Answer
C. 112.5ms-1 -
- 47.
The equation of a wave is y = 0.005sin[x(0.5x – 200t)] where x and y are in meters and t is in seconds. What is the velocity of the wave?
- A.
400ms-1
- B.
250ms-1
- C.
4000ms-1
- D.
40ms-1
Correct Answer
A. 400ms-1 -
- 48.
A ray of light strikes a plane mirror at a glancing angle of 500. Calculate the angle between the incident and reflected rays.
- A.
600
- B.
9000
- C.
500
- D.
800
Correct Answer
D. 800 -
- 49.
The velocities of light in air and glass are 3.0 x 108ms-1 and 2.0 x 108ms-1 respectively, if the angle of refraction is 300, the sine of the angle of incidence is (a) 0.33 (b) 0.50 (c) 0.67
- A.
0.75
- B.
0.33
- C.
0.66
- D.
0.65
Correct Answer
A. 0.75 -
- 50.
When an astronomical telescope is in normal adjustment, the focal length of the objective lens is 50cm and that of the eyepiece is 2.5cm. What’s the distance between the lenses?
- A.
47.5cm
- B.
52.5cm
- C.
125.5cm
- D.
20.5cm
Correct Answer
B. 52.5cm -
Quiz Review Timeline +
Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
-
Current Version
-
Apr 26, 2022Quiz Edited by
ProProfs Editorial Team -
Jun 20, 2020Quiz Created by
Jerome Zakari
Advanced Electromagnetism and Maxwell's Equations Quiz
Advanced Electromagnetism and Maxwell's Equations Quiz
Magnetohydrodynamics Quiz: Test Your Hydrodynamics Knowledge
Magnetohydrodynamics Quiz: Test Your Hydrodynamics Knowledge
Master Fluid Dynamics: Continuity Equation Quiz for Students
Master Fluid Dynamics: Continuity Equation Quiz for Students
Two-Dimensional Conformal Field Theory Quiz for Beginners
Two-Dimensional Conformal Field Theory Quiz for Beginners
Theoretical Physics Basics: Conformal Field Theory Quiz
Theoretical Physics Basics: Conformal Field Theory Quiz
Quantum Dynamics Test: Variational Perturbation Theory Quiz
Quantum Dynamics Test: Variational Perturbation Theory Quiz
- Aeronautics Quizzes
- Aerospace Quizzes
- Agricultural Science Quizzes
- Astrology Quizzes
- Astronomy Quizzes
- Atom Quizzes
- Biochemistry Quizzes
- Biology Quizzes
- Biomechanics Quizzes
- Biostatistics Quizzes
- Biotechnology Quizzes
- Botany Quizzes
- Branches Of Science Quizzes
- Chemistry Quizzes
- Cytology Quizzes
- Easy Science Quizzes
- Ecology Quizzes
- Electrical Quizzes
- Embryology Quizzes
- Endocrinology Quizzes
- Engineering Quizzes
- Environmental Science Quizzes
- Epidemiology Quizzes
- Experiment Quizzes
- Forestry Quizzes
- Fossil Quizzes
- Gas Quizzes
- General Science Quizzes
- Genetics Quizzes
- Histology Quizzes
- Human Biology Quizzes
- Integrated Science Quizzes
- Invention Quizzes
- Library Science Quizzes
- Lighting Quizzes
- Liquid Quizzes
- Marine Biology Quizzes
- Microbiology Quizzes
- Molecular Biology Quizzes
- Nature Quizzes
- Neuroscience Quizzes
- Nuclear Science Quizzes
- Oceanography Quizzes
- Psychology Quizzes
- Science And Technology Quizzes
- Science Glossary Quizzes
- Science Knowledge Quizzes
- Science Practice Quizzes
- Scientific Method Quizzes
- Scientific Notation Quizzes
- Soil Science Quizzes
- Solar System Quizzes
- Solid Quizzes
- Zoology Quizzes
Back to top