Practice post utme covenant university physics 2018 Past Questions

Question 1

A parallel plate capacitor has a capaci\tance of 10 μF. If a potential difference of 20 V is applied across it, what is the charge stored on each plate?

A. 20 μC

Correct B. 40 μC

C. 80 μC

D. 100 μC

Correct Answer: B

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Question 2

A 100 Ω resistor is connected in series with a 200 Ω resistor. If a current of 2 A flows through the circuit, what is the potential difference across the 200 Ω resistor?

A. 100 V

B. 200 V

Correct C. 400 V

D. 600 V

Correct Answer: C

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Question 3

A block of mass 5 kg is susp\ended from a spring with a spring cons\tant of 100 N/m. If the block is displaced by 0.2 m from its equilibrium position, what is the force exerted by the spring on the block?

A. 10 N

B. 20 N

C. 50 N

Correct D. 100 N

Correct Answer: D

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Question 4

A sound wave has a frequency of 200 Hz and a wavelength of 0.5 m. What is the speed of the sound wave?

A. 100 m/s

B. 200 m/s

Correct C. 400 m/s

D. 500 m/s

Correct Answer: C

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Question 5

A heat engine operates between two temperatures of 300 K and 400 K. If the engine absorbs 100 J of heat from the high-temperature reservoir, what is the efficiency of the engine?

A. 20%

B. 30%

Correct C. 40%

D. 50%

Correct Answer: C

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Question 6

A solid cylindrical rod of length 1.5 m and radius 0.05 m is made of a material with Young's modulus of 2.0 x 10^11 N/m^2. If a force of 50 N is applied \tangentially at one \end of the rod, what is the angular displacement of the other \end?

A. 0.01 rad

Correct B. 0.02 rad

C. 0.03 rad

D. 0.04 rad

Correct Answer: B

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Question 7

A ray of light passes from air into a glass block with a re\fractive index of 1.5. If the angle of incidence is 30°, what is the angle of re\fraction?

A. 20°

B. 25°

Correct C. 30°

D. 35°

Correct Answer: C

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Question 8

A 100 Ω resistor is connected in series with a 200 Ω resistor and a 50 Ω resistor. What is the equivalent resis\tance?

A. 100 Ω

B. 200 Ω

Correct C. 300 Ω

D. 400 Ω

Correct Answer: C

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Question 9

A 10 V battery is connected to a 100 Ω resistor. What is the current flowing through the resistor?

Correct A. 0.1 A

B. 0.2 A

C. 0.3 A

D. 0.4 A

Correct Answer: A

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Question 10

A 5 kg block 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, what is the potential energy stored in the spring?

A. 10 J

B. 20 J

Correct C. 30 J

D. 40 J

Correct Answer: C

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Question 11

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 12

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

Correct B. 2 A

C. 3 A

D. 4 A

Correct Answer: B

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Question 13

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 14

A body of mass 5 kg is moving in a straight line with an initial velocity of 10 m/s. If the body is subjected to a force of 20 N, what is the acceleration of the body?

A. 2 m/s^2

B. 4 m/s^2

C. 6 m/s^2

Correct D. 8 m/s^2

Correct Answer: D

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Question 15

A circuit consists of a 9 V battery, a 2 Ω resistor, and a 3 Ω resistor connected in parallel. What is the current flowing through the 2 Ω resistor?

A. 2 A

Correct B. 3 A

C. 4 A

D. 5 A

Correct Answer: B

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Question 16

A wave has a frequency of 100 Hz and a speed of 300 m/s. What is the wavelength of the wave?

A. 0.1 m

B. 0.2 m

Correct C. 0.3 m

D. 0.4 m

Correct Answer: C

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Question 17

A body of mass 3 kg is moving in a circular path of radius 2 m with a cons\tant speed of 5 m/s. If the body is subjected to a centripetal force of 15 N, what is the magnitude of the acceleration of the body?

A. 6 m/s^2

B. 8 m/s^2

Correct C. 10 m/s^2

D. 12 m/s^2

Correct Answer: C

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Question 18

A circuit consists of a 15 V battery, a 6 Ω resistor, and a 3 Ω resistor connected in series. What is the current flowing through the circuit?

Question 19

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. 2 m/s^2

B. 4 m/s^2

Correct C. 6 m/s^2

D. 8 m/s^2

Correct Answer: C

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Question 20

A light ray passes from air into a glass slab of re\fractive index 1.5. If the angle of incidence is 30°, what is the angle of re\fraction?

A. 20°

Correct B. 25°

C. 30°

D. 35°

Correct Answer: B

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Question 21

A magnetic field of 0.5 T is applied to a coil of 100 turns and a radius of 0.2 m. If the current in the coil is 2 A, what is the magnitude of the torque experienced by the coil?

A. 0.1 Nm

B. 0.2 Nm

Correct C. 0.3 Nm

D. 0.4 Nm

Correct Answer: C

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Question 22

A wave of frequency 100 Hz and amplitude 0.5 m is traveling through a medium with a speed of 300 m/s. If the wave is reflected from a fixed \end, what is the magnitude of the displacement of the wave at the fixed \end?

Correct A. 0 m

B. 0.1 m

C. 0.2 m

D. 0.3 m

Correct Answer: A

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Question 23

A nucleus of mass number 20 and atomic number 10 undergoes \beta decay. What is the resulting nucleus?

A. 20

Correct B. 21

C. 22

D. 23

Correct Answer: B

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Question 24

A light ray passes through a prism of angle 30° and is re\fracted at an angle of 20°. What is the angle of deviation?

A. 10°

Correct B. 20°

C. 30°

D. 40°

Correct Answer: B

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Question 25

A coil of 100 turns and a radius of 0.2 m is placed in a magnetic field of 0.5 T. If the current in the coil is 2 A, what is the magnitude of the induced emf?

A. 0.1 V

B. 0.2 V

Correct C. 0.3 V

D. 0.4 V

Correct Answer: C

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