Practice post utme bowen university physics 2020 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. What is the magnitude of the 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 2

A radioactive sample has a half-life of 5 years. If the initial activity is 1000 Bq, what is the activity after 10 years?

Correct A. 125 Bq

B. 250 Bq

C. 500 Bq

D. 1000 Bq

Correct Answer: A

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Question 3

A gas is contained in a cylinder of volume 2 L at a pressure of 2 atm. If the temperature is increased by 10°C, what is the new pressure?

A. 2.5 atm

B. 3 atm

Correct C. 3.5 atm

D. 4 atm

Correct Answer: C

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Question 4

A wave has a frequency of 50 Hz and a wavelength of 0.1 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 5

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

A. 5 m

Correct B. 10 m

C. 15 m

D. 20 m

Correct Answer: B

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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. 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 7

A gas is enclosed in a container of volume 2 m^3 at a pressure of 1 atm. If the temperature is increased by 10°C, what is the new pressure of the gas?

A. 1.2 atm

B. 1.5 atm

Correct C. 2.0 atm

D. 2.5 atm

Correct Answer: C

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Question 8

A convex lens of focal length 20 cm is used to form an image of an object placed 30 cm from the lens. What is the magnification of the image?

A. 0.5

Correct B. 1.0

C. 2.0

D. 3.0

Correct Answer: B

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Question 9

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 10

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. 5 m

Correct B. 10 m

C. 15 m

D. 20 m

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 force of 12 N, what is the magnitude of the acceleration of the particle?

Correct A. 6 m/s^2

B. 12 m/s^2

C. 18 m/s^2

D. 24 m/s^2

Correct Answer: A

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Question 12

A photon of energy 2 eV is incident on a metal surface with a work function of 1.5 eV. What is the maximum kinetic energy of the photoelectron?

Correct A. 0.5 eV

B. 1 eV

C. 1.5 eV

D. 2 eV

Correct Answer: A

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Question 13

A radioactive sample has a half-life of 2 days. If the initial activity is 100 Bq, what is the activity after 4 days?

Correct A. 12.5 Bq

B. 25 Bq

C. 50 Bq

D. 100 Bq

Correct Answer: A

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Question 14

A block of mass 5 kg is moving with a velocity of 10 m/s. If a force of 20 N is applied to the block, what is the acceleration of the block?

Correct A. 4 m/s^2

B. 8 m/s^2

C. 12 m/s^2

D. 16 m/s^2

Correct Answer: A

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Question 15

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

A. 50 m/s

Correct B. 100 m/s

C. 150 m/s

D. 200 m/s

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. 4 m/s^2

B. 6 m/s^2

Correct C. 8 m/s^2

D. 10 m/s^2

Correct Answer: C

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Question 17

A capacitor of capaci\tance 10 μF is connected in series with a resistor of resis\tance 20 Ω. If a voltage of 50 V is applied across the circuit, what is the current flowing through the circuit?

A. 1.25 A

Correct B. 2.5 A

C. 5 A

D. 10 A

Correct Answer: B

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Question 18

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

A. 0.1

Correct B. 0.25

C. 0.5

D. 0.75

Correct Answer: B

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Question 19

A magnetic field of strength 0.5 T is directed along the z-axis. If a current of 2 A is flowing in a wire loop of radius 0.2 m, what is the magnitude of the magnetic moment of the loop?

A. 0.1 π A m^2

Correct B. 0.125 π A m^2

C. 0.15 π A m^2

D. 0.2 π A m^2

Correct Answer: B

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Question 20

A 10 μF capacitor is connected in parallel with a 20 μF capacitor. If a voltage of 50 V is applied across the combination, what is the equivalent capaci\tance?

A. 10 μF

B. 20 μF

Correct C. 30 μF

D. 40 μF

Correct Answer: C

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Question 21

A parallel plate capacitor has a capaci\tance of 10 μF and is charged to a potential difference of 100 V. If the dis\tance between the plates is doubled, what is the new capaci\tance?

A. 5 μF

B. 10 μF

Correct C. 20 μF

D. 40 μF

Correct Answer: C

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Question 22

A particle of mass 2 kg is moving in a circular path of radius 3 m with a speed of 4 m/s. What is the magnitude of the centripetal 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 23

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

Correct A. 25 Bq

B. 50 Bq

C. 75 Bq

D. 100 Bq

Correct Answer: A

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Question 24

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

A. 0.5 rad/s

B. 1 rad/s

Correct C. 2 rad/s

D. 4 rad/s

Correct Answer: C

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Question 25

A fluid of density 1000 kg/m³ is flowing through a pipe of radius 0.1 m with a velocity of 2 m/s. What is the pressure at the center of the pipe?

A. 1000 Pa

B. 2000 Pa

Correct C. 3000 Pa

D. 4000 Pa

Correct Answer: C

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