Practice post utme afe babalola university physics 2022 Past Questions

Question 1

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 acceleration of 2 m/s^2, what is the magnitude of the net force acting on the particle?

A. 10 N

Correct B. 12 N

C. 15 N

D. 18 N

Correct Answer: B

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Question 2

A capacitor consists of two parallel plates, each of area 0.1 m^2, separated by a dis\tance of 0.01 m. The plates are charged to a potential difference of 10 V. What is the capaci\tance of the capacitor?

Correct A. 0.01 F

B. 0.02 F

C. 0.03 F

D. 0.04 F

Correct Answer: A

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Question 3

A coil of wire has a resis\tance of 10 ohms and an induc\tance of 0.1 H. If a current of 2 A is passed through the coil, what is the magnitude of the induced emf?

A. 0.2 V

Correct B. 0.4 V

C. 0.6 V

D. 0.8 V

Correct Answer: B

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Question 4

A simple p\endulum consists of a point mass attached to a massless string of length 1 m. If the p\endulum is displaced by an angle of 30 degrees from its equilibrium position and released, what is the magnitude of the tension in the string?

Correct A. 10 N

B. 12 N

C. 15 N

D. 18 N

Correct Answer: A

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Question 5

A magnetic field of strength 0.1 T is directed along the x-axis. A current of 2 A is flowing in a wire loop of radius 0.1 m. What is the magnitude of the magnetic moment of the loop?

Correct A. 0.02 A m^2

B. 0.04 A m^2

C. 0.06 A m^2

D. 0.08 A m^2

Correct Answer: A

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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 subjected to a centripetal force of 12 N, what is the magnitude of the acceleration of the particle?

A. 4 m/s^2

Correct B. 6 m/s^2

C. 8 m/s^2

D. 10 m/s^2

Correct Answer: B

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Question 7

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

A. 5 m/s

Correct B. 10 m/s

C. 15 m/s

D. 20 m/s

Correct Answer: B

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Question 8

A body of mass 5 kg is moving in a straight line with a 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

Correct B. 4 m/s^2

C. 6 m/s^2

D. 8 m/s^2

Correct Answer: B

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Question 9

A simple harmonic motion has a frequency of 20 Hz and an amplitude of 0.5 m. What is the angular frequency of the motion?

A. 20 \pi rad/s

B. 30 \pi rad/s

Correct C. 40 \pi rad/s

D. 50 \pi rad/s

Correct Answer: C

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Question 10

A gas has a volume of 2 m^3 and a pressure of 100 kPa. If the temperature of the gas is increased by 20 K, what is the new pressure of the gas?

A. 90 kPa

B. 100 kPa

Correct C. 110 kPa

D. 120 kPa

Correct Answer: C

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Question 11

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

A. 0.2 C

Correct B. 0.4 C

C. 0.6 C

D. 0.8 C

Correct Answer: B

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Question 12

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. Calculate the magnitude of the centripetal acceleration.

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 13

A convex lens of focal length 20 cm is used to form an image of an object placed 30 cm in front of it. Calculate the magnification of the image.

A. -1

Correct B. -0.5

C. 0.5

D. 1

Correct Answer: B

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Question 14

A circuit consists of a 10 Ω resistor and a 20 Ω resistor connected in series. If a current of 2 A flows through the circuit, calculate the potential difference across the 20 Ω resistor.

A. 10 V

B. 20 V

Correct C. 30 V

D. 40 V

Correct Answer: C

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Question 15

A ray of light passes through a prism and is re\fracted at an angle of 30°. If the angle of incidence is 20°, calculate the angle of re\fraction.

A. 10°

B. 20°

Correct C. 30°

D. 40°

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 acceleration of 2 m/s^2, what is the magnitude of the net force acting on the particle?

A. 8 N

B. 12 N

Correct C. 16 N

D. 20 N

Correct Answer: C

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Question 17

A block of mass 5 kg is attached to a horizontal, massless spring with a force cons\tant of 200 N/m. The block is displaced by 2 m from its equilibrium position and released from rest. What is the maximum speed of the block as it oscillates?

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 18

A parallel plate capacitor consists of two plates, each of area 0.1 m^2, separated by a dis\tance of 0.01 m. The capaci\tance of the capacitor is 10 nF. If a potential difference of 5 V is applied across the capacitor, what is the magnitude of the electric field between the plates?

A. 1000 V/m

Correct B. 2000 V/m

C. 3000 V/m

D. 4000 V/m

Correct Answer: B

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Question 19

A radioactive sample decays from 100 g to 50 g in 10 years. What is the half-life of the sample?

A. 5 years

Correct B. 10 years

C. 15 years

D. 20 years

Correct Answer: B

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Question 20

A car travels from point A to point B with an average speed of 60 km/h. If the dis\tance between the two points is 240 km, what is the time taken by the car to travel from point A to point B?

A. 4 hours

Correct B. 6 hours

C. 8 hours

D. 10 hours

Correct Answer: B

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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 angle between the force and the radius vector at the ins\tant when the particle is at the top of its path?

A. 30°

B. 45°

Correct C. 60°

D. 75°

Correct Answer: C

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Question 22

A block of mass 5 kg is placed on a frictionless surface and connected to a spring with a spring cons\tant of 200 N/m. If the block is displaced by 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 23

A wave with a frequency of 50 Hz and a wavelength of 2 m is traveling through a medium. If the wave is reflected from a fixed \end, what is the frequency of the reflected wave?

A. 25 Hz

Correct B. 50 Hz

C. 75 Hz

D. 100 Hz

Correct Answer: B

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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 60° above the horizontal. If air resis\tance is neglected, 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 simple harmonic motion has a period of 2 s and an amplitude of 3 m. If the motion is described by the equation x(t) = 3\cos(πt), what is the angular frequency of the motion?

A. π rad/s

Correct B. 2π rad/s

C. 3π rad/s

D. 4π rad/s

Correct Answer: B

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