# Physics Full Length Test

60 Questions | Total Attempts: 611  Settings  . Click on Start it May take 1 to 2 minutes to start.

• 1.
Two point particles, with a charges of q and q', are placed a distance r apart. The electric field is zero at a point P between the particles on the line segment connecting them. We concludethat:
• A.

Q and q' must have the same magnitude and sign

• B.

Q and q' must have the same sign but may have different magnitudes

• C.

Q and q' have equal magnitudes and opposite signs

• D.

P must be midway between the particles

• 2.
If both the plate area and the plate separation of a parallel-plate capacitor are doubled, the capacitance is:
• A.

Doubled

• B.

Halved

• C.

Tripled

• D.

• E.

Unchanged

• 3.
Two identical capacitors, each with capacitance C, are connected in parallel and the combination is connected in series to a third identical capacitor. The equivalent capacitance of this arrangement is:
• A.

2C/3

• B.

C

• C.

3C/2

• D.

2C

• E.

3C

• 4.
The diagram shows four 6-μF capacitors. The capacitance between points a and b is:
• A.

3 μF

• B.

4 μF

• C.

6 μF

• D.

9 μF

• E.

1 μF

• 5.
Which of the following graphs best represents the current-voltage relationship of an incandescent light bulb?
• A.
• B.
• C.
• D.
• 6.
The direction of the magnetic field in a certain region of space is determined by firing a test charge into the region with its velocity in various directions in different trials. The field direction is:
• A.

One of the directions of the velocity when the magnetic force is zero

• B.

The direction of the velocity when the magnetic force is a maximum

• C.

The direction of the magnetic force

• D.

Perpendicular to the velocity when the magnetic force is zero

• E.

None

• 7.
A loop of wire carrying a current of 2.0 A is in the shape of a right triangle with two equal sides, each 15 cm long. A 0.7T uniform magnetic field is parallel to the hypotenuse. The resultant magnetic force on the two equal sides has a magnitude of:
• A.

0

• B.

0.21 N

• C.

0.30 N

• D.

0.51 N

• 8.
The magnetic field B inside a long ideal solenoid is independent of:
• A.

The current

• B.

The core material

• C.

The spacing of the windings

• D.

The cross-sectional area of the solenoid

• E.

The direction of the current

• 9.
An RL series circuit is connected to an ac generator with a maximum emf of 20 V. If the maximum potential difference across the resistor is 16 V, then the maximum potential difference across the inductor is:
• A.

2 V

• B.

4V

• C.

12V

• D.

25V

• 10.
When you stand in front of a plane mirror, your image is:
• A.

Real, erect, and smaller than you

• B.

Real, erect, and the same size as you

• C.

Virtual, erect, and smaller than you

• D.

Real, inverted, and the same size as you

• E.

Virtual, erect, and the same size as you

• 11.
Which of the following is NOT correct for a simple magnifying glass?
• A.

The image is virtual

• B.

The image is erect

• C.

The image is larger than the object

• D.

The object is inside the focal point

• E.

The lens is diverging

• 12.
In an experiment to measure the wavelength of light using a double slit, it is found that thefringes are too close together to easily count them. To spread out the fringe pattern, one could:
• A.

Decrease the slit separation

• B.

Increase the slit separation

• C.

Increase the width of each slit

• D.

Decrease the width of each slit

• E.

None of Given

• 13.
The rainbow seen after a rain shower is caused by:
• A.

Diffraction

• B.

Interference

• C.

Refraction

• D.

Polarization

• 14.
The magnifying power of Telescope can be increased by using:
• A.

Objective of Large focal length

• B.

Objective of Short focal length

• C.

Eye Piece of Large focal length

• D.

Eye Piece and Objective of Large focal length

• E.

None of Given

• 15.
The resolving power of a diffraction grating is defined by:
• A.

λ/Δλ

• B.

Δλ/λ

• C.

Δλ+λ/λ

• D.

Δλ-λ/λ

• E.

None of Given

• 16.
A consequence of Einstein’s theory of relativity is:
• A.

Moving clocks run faster than when they are at rest

• B.

Moving rods are longer than when they are at rest

• C.

The laws of physics must appear the same to all observers moving with uniform velocity relative to each other

• D.

Everything is relative

• E.

Light has both wave and particle properties

• 17.
A particle moves in simple harmonic motion according to x = 2 cos(50t), where x is in meters and t is in seconds. Its maximum velocity in m/s is:
• A.

100 sin(50t)

• B.

100 cos(50t)

• C.

100

• D.

200

• E.

None of Given

• 18.
A simple pendulum is suspended from the ceiling of an elevator. The elevator is accelerating upwards with acceleration a. The period of this pendulum, in terms of its length L, g, and ais:
• A.
• B.
• C.
• D.
• E.
• 19.
Let U be the potential energy (with the zero at zero displacement) and K be the kinetic energy of a simple harmonic oscillator. U(avg) and K(avg) are the average values over a cycle. Then:
• A.

K(avg( > U(avg)

• B.

K(avg) = U(avg)

• C.

K = 0 when U = 0

• D.

K + U = 0

• E.

K(avg)< U(avg)

• 20.
An artificial satellite of Earth releases a bomb. Neglecting air resistance, the bomb will:
• A.

Strike Earth under the satellite at the instant of release

• B.

Strike Earth under the satellite at the instant of impact

• C.

Strike Earth ahead of the satellite at the instant of impact

• D.

Strike Earth behind the satellite at the instant of impact

• E.

None of Given

• 21.
The mass of a hypothetical planet is 1/100 that of Earth and its radius is 1/4 that of Earth. If a person weighs 600N on Earth, what would he weigh on this planet?
• A.

24 N

• B.

48 N

• C.

96 N

• D.

192 N

• E.

600 N

• 22.
An ice skater with rotational inertia I is spinning with angular speed ω. She pulls her arms in, thereby increasing her angular speed to 4 ω. Her rotational inertia is then:
• A.

I / 2

• B.

2 I

• C.

I / 4

• D.

4 I

• E.

I

• 23.
Young’s modulus can be used to calculate the strain for a stress that is:
• A.

Just below the ultimate strength

• B.

just above the ultimate strength

• C.

Well below the yield strength

• D.

Well above the yield strength

• E.

None of Given

• 24.
Which of the following has the same unit as Farad
• A.
• B.
• C.
• D.
• 25.
The Speed of Waves in a stretched string depends on:
• A.

The Tension in the String

• B.

The Amplitude of Wave

• C.

The Acceleration of gravity

• D.

All of Given

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