Practice post utme crawford university physics 2025 Past Questions

Question 1

A parallel plate capacitor has plates of area 0.04 m^2, separated by a dis\tance of 0.02 m. The capaci\tance is 2.5 nF. If the potential difference between the plates is increased to 10 V, what is the new charge on the capacitor?

A. 62.5 nC

B. 125 nC

Correct C. 250 nC

D. 500 nC

Correct Answer: C

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Question 2

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. What is the magnitude of the force acting on the particle?

A. 10 N

B. 20 N

Correct C. 30 N

D. 40 N

Correct Answer: C

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Question 3

A radioactive sample has a half-life of 5 years. If the initial activity is 100 Bq, what is the activity after 10 years?

A. 12.5 Bq

Correct B. 25 Bq

C. 50 Bq

D. 100 Bq

Correct Answer: B

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Question 4

A simple harmonic motion has a maximum displacement of 2 m and a period of 4 s. What is the angular frequency?

A. 1.57 rad/s

B. 3.14 rad/s

Correct C. 6.28 rad/s

D. 12.56 rad/s

Correct Answer: C

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Question 5

A parallel plate capacitor has plates of area 0.04 m^2, separated by a dis\tance of 0.02 m. The capaci\tance is 2.5 nF. If the potential difference between the plates is increased to 10 V, what is the new charge on the capacitor?

A. 62.5 nC

B. 125 nC

Correct C. 250 nC

D. 500 nC

Correct Answer: C

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Question 6

A charged particle moves through a region with a uniform magnetic field. If the particle's velocity is perp\endicular to the magnetic field, what is the direction of the force exerted on the particle?

Correct A. Tangential to the particle's velocity

B. Radial to the particle's velocity

C. Perp\endicular to the particle's velocity

D. Along the magnetic field

Correct Answer: A

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Question 7

A thermodynamic system undergoes a process from state A to state B. If the system's internal energy increases by 100 J and the work done on the system is 50 J, what is the change in the system's entropy?

A. 0.5 J/K

Correct B. 1.0 J/K

C. 1.5 J/K

D. 2.0 J/K

Correct Answer: B

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Question 8

A gas is confined to a container with a movable piston. If the gas is heated, what happens to the pressure of the gas?

Correct A. Increases

B. Decreases

C. Remains cons\tant

D. Dep\ends on the initial pressure

Correct Answer: A

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Question 9

A wave has a frequency of 50 Hz and a wavelength of 2 m. What is the speed of the wave?

A. 100 m/s

Correct B. 200 m/s

C. 500 m/s

D. 1000 m/s

Correct Answer: B

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Question 10

A simple harmonic motion has a maximum displacement of 5 cm and a period of 2 s. What is the angular frequency of the motion?

A. 1 rad/s

Correct B. 2 rad/s

C. 3 rad/s

D. 4 rad/s

Correct Answer: B

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

A. 12 N

B. 16 N

Correct C. 20 N

D. 24 N

Correct Answer: C

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Question 12

A radioactive sample has an initial activity of 100 Bq. If the half-life of the sample is 5 days, what is the activity of the sample after 10 days?

A. 25 Bq

Correct B. 50 Bq

C. 75 Bq

D. 100 Bq

Correct Answer: B

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Question 13

A simple harmonic motion has a maximum displacement of 2 m and a period of 4 s. If the motion starts from its equilibrium position, what is the displacement of the particle at time t = 2 s?

A. 0.5 m

B. 1 m

Correct C. 1.5 m

D. 2 m

Correct Answer: C

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Question 14

A magnetic field of 0.5 T is directed along the z-axis. If 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?

A. 0.1 A m^2

Correct B. 0.2 A m^2

C. 0.3 A m^2

D. 0.4 A m^2

Correct Answer: B

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Question 15

A vector has a magnitude of 5 m and makes an angle of 30° with the x-axis. If the vector is projected onto the y-axis, what is the magnitude of the projection?

A. 2 m

Correct B. 3 m

C. 4 m

D. 5 m

Correct Answer: B

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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. 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 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?

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 radioactive sample has a half-life of 10 years. If the initial activity of the sample is 100 Bq, what is the activity of the sample after 20 years?

Correct A. 12.5 Bq

B. 25 Bq

C. 50 Bq

D. 100 Bq

Correct Answer: A

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Question 19

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 20

A particle of mass 1 kg is moving in a circular path of radius 2 m with a cons\tant speed of 3 m/s. If the particle is subjected to a centripetal force of 9 N, what is the magnitude of the acceleration of the particle?

A. 1 m/s^2

B. 2 m/s^2

Correct C. 3 m/s^2

D. 4 m/s^2

Correct Answer: C

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

A. 10 N

B. 12 N

Correct C. 16 N

D. 20 N

Correct Answer: C

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Question 22

A radioactive sample has a half-life of 5 years. If the initial activity of the sample is 100 Bq, what is the activity of the sample after 10 years?

Correct A. 12.5 Bq

B. 25 Bq

C. 50 Bq

D. 100 Bq

Correct Answer: A

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Question 23

A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 30° above the horizontal. If the projectile lands 10 m away from the launch point, what is the time of flight?

A. 1.5 s

Correct B. 2 s

C. 2.5 s

D. 3 s

Correct Answer: B

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Question 24

A wave has a frequency of 50 Hz and a wavelength of 2 m. If the wave is traveling in the positive x-direction, what is the direction of the wave's velocity?

Correct A. positive x-direction

B. negative x-direction

C. positive y-direction

D. negative y-direction

Correct Answer: A

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Question 25

A simple harmonic motion has a maximum displacement of 5 m and a period of 2 s. If the motion starts from its equilibrium position, what is the amplitude of the motion?

Correct A. 2.5 m

B. 3 m

C. 4 m

D. 5 m

Correct Answer: A

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