Practice post utme wellspring university physics 2021 Past Questions

Question 1

A light ray passes through a prism and is re\fracted. If the angle of incidence is 30° and the angle of re\fraction is 20°, what is the angle of deviation?

A. 40°

B. 50°

Correct C. 60°

D. 70°

Correct Answer: C

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Question 2

A circuit consists of a 12 V battery, a 4 Ω resistor, and a 6 Ω resistor connected in series. What is the current flowing through the circuit?

A. 1.5 A

Correct B. 2 A

C. 2.5 A

D. 3 A

Correct Answer: B

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Question 3

A particle moves in a circular path with a cons\tant speed of 5 m/s. If the radius of the circle is 2 m, what is the angular velocity of the particle?

A. 2 rad/s

Correct B. 4 rad/s

C. 6 rad/s

D. 8 rad/s

Correct Answer: B

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Question 4

A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 30° above the horizontal. What is the maximum height reached by the projectile?

A. 10 m

Correct B. 15 m

C. 20 m

D. 25 m

Correct Answer: B

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Question 5

A coil of wire has a resis\tance of 10 Ω and an induc\tance of 5 H. If the current flowing through the coil is 2 A, what is the induced emf?

A. 10 V

B. 20 V

Correct C. 30 V

D. 40 V

Correct Answer: C

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Question 6

A particle of mass 2 kg is moving in a circular path of radius 3 m with a cons\tant speed of 4 m/s. If the particle is subject to a centripetal force of 12 N, what is the magnitude of the net force acting on the particle?

A. 16 N

B. 20 N

Correct C. 24 N

D. 28 N

Correct Answer: C

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Question 7

A 100 W light bulb is connected to a 220 V power source. If the bulb is used for 5 hours a day, how much electricity does it consume in a month?

A. 120 kWh

B. 150 kWh

Correct C. 180 kWh

D. 200 kWh

Correct Answer: C

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Question 8

A wave has a frequency of 50 Hz and a wavelength of 0.1 m. What is its speed?

A. 5 m/s

B. 10 m/s

Correct C. 20 m/s

D. 50 m/s

Correct Answer: C

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Question 9

A particle of mass 1 kg is moving in a straight line with a velocity of 2 m/s. If it is subject to a force of 10 N, what is its acceleration?

A. 5 m/s^2

Correct B. 10 m/s^2

C. 15 m/s^2

D. 20 m/s^2

Correct Answer: B

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Question 10

A 10 V battery is connected to a 2 ohm resistor. If the current flowing through the resistor is 2 A, what is the power dissipated?

A. 20 W

Correct B. 40 W

C. 60 W

D. 80 W

Correct Answer: B

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Question 11

A uniform magnetic field of strength 2 T is applied to a coil of wire with 100 turns. If the coil has a resis\tance of 5 Ω and a self-induc\tance of 0.05 H, what is the induced emf in the coil when the current through it is changing at a rate of 10 A/s?

A. 0.25 V

Correct B. 1.25 V

C. 2.5 V

D. 5 V

Correct Answer: B

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Question 12

A solid sphere of radius 0.1 m and mass 0.5 kg is susp\ended from a wire of length 0.2 m. If the sphere is displaced by 0.01 m from its equilibrium position, what is the period of small oscillations?

A. 0.5 s

Correct B. 1 s

C. 2 s

D. 5 s

Correct Answer: B

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Question 13

A gas at a pressure of 2 atm and temperature of 300 K is heated to a temperature of 400 K. What is the final pressure of the gas?

A. 1.5 atm

Correct B. 2.5 atm

C. 3 atm

D. 4 atm

Correct Answer: B

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Question 14

A particle of mass 0.1 kg is moving in a circular orbit of radius 0.2 m with a speed of 0.5 m/s. What is the centripetal force acting on the particle?

A. 0.05 N

B. 0.1 N

Correct C. 0.2 N

D. 0.5 N

Correct Answer: C

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Question 15

A beam of light is incident on a prism at an angle of 30°. If the re\fractive index of the prism is 1.5, what is the angle of re\fraction?

A. 20°

B. 30°

Correct C. 40°

D. 50°

Correct Answer: C

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Question 16

A particle of mass 2 kg is moving in a circular path of radius 3 m with a cons\tant speed of 4 m/s. If the particle is subjected to a centripetal force of 12 N, what is the magnitude of the acceleration of the particle?

A. 8 m/s^2

B. 12 m/s^2

Correct C. 16 m/s^2

D. 20 m/s^2

Correct Answer: C

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Question 17

A capacitor consists of two parallel plates, each of area 0.1 m^2, separated by a dis\tance of 0.01 m. If the capaci\tance of the capacitor is 10^-6 F, what is the magnitude of the electric field between the plates when a potential difference of 10 V is applied?

Correct A. 10^6 V/m

B. 10^5 V/m

C. 10^4 V/m

D. 10^3 V/m

Correct Answer: A

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Question 18

A block of mass 5 kg is attached to a horizontal spring with a force cons\tant of 100 N/m. If the block is displaced by 0.2 m from its equilibrium position and released from rest, what is the maximum speed of the block?

A. 2 m/s

B. 4 m/s

Correct C. 6 m/s

D. 8 m/s

Correct Answer: C

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Question 19

A \tank of water is filled to a height of 10 m. If a small hole of area 0.01 m^2 is drilled at the bottom of the \tank, what is the rate of flow of water out of the \tank?

A. 0.1 m^3/s

Correct B. 0.2 m^3/s

C. 0.3 m^3/s

D. 0.4 m^3/s

Correct Answer: B

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Question 20

A bar magnet is placed near a compass. If the compass needle deflects by 30°, what is the magnitude of the magnetic field at the location of the compass?

Correct A. 10^-5 T

B. 10^-6 T

C. 10^-7 T

D. 10^-8 T

Correct Answer: A

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Question 21

A particle of mass 2 kg is moving in a circular path of radius 3 m with a cons\tant speed of 4 m/s. If the particle is subjected to a centripetal force of 12 N, what is the magnitude of the acceleration of the particle?

A. 10 m/s^2

Correct B. 12 m/s^2

C. 15 m/s^2

D. 20 m/s^2

Correct Answer: B

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Question 22

A wave has a frequency of 50 Hz and a wavelength of 0.2 m. What is the speed of the wave?

A. 10 m/s

B. 20 m/s

Correct C. 30 m/s

D. 40 m/s

Correct Answer: C

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Question 23

A circuit consists of a 12 V battery, a 4 Ω resistor, and a 6 Ω resistor connected in series. What is the current flowing through the circuit?

A. 1 A

B. 2 A

Correct C. 3 A

D. 4 A

Correct Answer: C

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Question 24

A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 30° above the horizontal. What is the maximum height reached by the projectile?

A. 10 m

B. 15 m

Correct C. 20 m

D. 25 m

Correct Answer: C

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Question 25

A sound wave has a frequency of 200 Hz and a wavelength of 1.5 m. What is the speed of the sound wave?

A. 300 m/s

Correct B. 400 m/s

C. 500 m/s

D. 600 m/s

Correct Answer: B

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