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POST UTME BELLS UNIVERSITY 2023 Physics | Objective

Are you preparing for POST UTME BELLS UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2023 Physics (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

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 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

Correct B. 20 m/s

C. 30 m/s

D. 40 m/s

Correct Answer: B

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Question 3

A radioactive sample has an initial activity of 100 Bq. After 2 hours, the activity decreases to 50 Bq. What is the half-life of the sample?

A. 1 hour

Correct B. 2 hours

C. 3 hours

D. 4 hours

Correct Answer: B

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Question 4

A projectile is launched at an angle of 60° above the horizontal with an initial velocity of 20 m/s. 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 5

A heat engine operates between a high-temperature reservoir at 500 K and a low-temperature reservoir at 300 K. What is the efficiency of the engine?

A. 0.2

B. 0.3

Correct C. 0.4

D. 0.5

Correct Answer: C

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Question 6

A parallel plate capacitor with plates of area 0.04 m^2 and separation 0.02 m is charged to a potential difference of 12 V. If the capaci\tance is 2.5 x 10^-6 F, calculate the energy stored in the capacitor.

A. 0.18 J

Correct B. 0.36 J

C. 0.54 J

D. 0.72 J

Correct Answer: B

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Question 7

A gas at 300 K and 1 atm expands to 2 atm. Assuming ideal gas behavior, calculate the new temperature of the gas.

A. 400 K

B. 500 K

Correct C. 600 K

D. 700 K

Correct Answer: C

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Question 8

A 5 kg block is attached to a horizontal, massless spring with a force cons\tant of 200 N/m. The block is displaced by 0.2 m from its equilibrium position and released from rest. Assuming the block undergoes simple harmonic motion, calculate the maximum speed of the block.

A. 0.5 m/s

B. 1.0 m/s

Correct C. 1.5 m/s

D. 2.0 m/s

Correct Answer: C

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Question 9

A 2 A current flows through a 10 Ω resistor. Calculate the power dissipated in the resistor.

A. 20 W

Correct B. 40 W

C. 60 W

D. 80 W

Correct Answer: B

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Question 10

A 1000 mL flask contains 0.5 M HCl and 0.5 M NaOH. Calculate the number of moles of HCl that react with NaOH.

A. 0.25 mol

Correct B. 0.5 mol

C. 0.75 mol

D. 1.0 mol

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. If the particle experiences a centripetal force of 10 N, what is its angular velocity?

A. 2 rad/s

B. 4 rad/s

Correct C. 6 rad/s

D. 8 rad/s

Correct Answer: C

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Question 12

A radioactive sample decays at a rate of 0.05% per hour. If the initial mass of the sample is 100 g, how much of the sample will remain after 5 hours?

A. 90 g

Correct B. 95 g

C. 98 g

D. 99 g

Correct Answer: B

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Question 13

A block of mass 5 kg is placed on a frictionless surface and a horizontal force of 20 N is applied to it. What is the acceleration of the block?

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 14

A \tank is filled with water to a height of 10 m. If the density of water is 1000 kg/m^3, what is the pressure at the bottom of the \tank?

A. 10000 Pa

B. 20000 Pa

Correct C. 30000 Pa

D. 40000 Pa

Correct Answer: C

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Question 15

A spring with a spring cons\tant of 100 N/m is stretched by 2 m. What is the potential energy stored in the spring?

A. 100 J

B. 200 J

Correct C. 300 J

D. 400 J

Correct Answer: C

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Question 16

A light ray passes through a converging lens and is focused at a point 15 cm from the lens. If the focal length of the lens is 10 cm, calculate the object dis\tance.

Correct A. 5 cm

B. 10 cm

C. 15 cm

D. 20 cm

Correct Answer: A

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Question 17

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 force acting on the particle.

A. 10 N

Correct B. 12 N

C. 15 N

D. 20 N

Correct Answer: B

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Question 18

A capacitor of capaci\tance 10 μF is connected across a 20 V battery. Calculate the charge stored in 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 19

A block of mass 5 kg is placed on a frictionless surface and a horizontal force of 10 N is applied to it. Calculate the acceleration of the block.

A. 0.5 m/s^2

Correct B. 1 m/s^2

C. 2 m/s^2

D. 5 m/s^2

Correct Answer: B

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Question 20

A light ray passes through a converging lens and is focused at a point 15 cm from the lens. If the focal length of the lens is 10 cm, calculate the object dis\tance.

Correct A. 5 cm

B. 10 cm

C. 15 cm

D. 20 cm

Correct Answer: A

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Question 21

A 50 Hz, 200 V AC supply is connected across a coil of induc\tance 0.1 H and resis\tance 10 Ω. Calculate the impedance of the coil.

A. 20 Ω

Correct B. 22 Ω

C. 25 Ω

D. 30 Ω

Correct Answer: B

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Question 22

A body of mass 5 kg is moving with a velocity of 10 m/s. If the force acting on it is 20 N, calculate the acceleration of the body.

Correct A. 2 m/s^2

B. 4 m/s^2

C. 6 m/s^2

D. 8 m/s^2

Correct Answer: A

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Question 23

A heat engine operates between the temperatures 500 K and 300 K. If the efficiency of the engine is 30%, calculate the work done by the engine.

A. 1000 J

Correct B. 2000 J

C. 3000 J

D. 4000 J

Correct Answer: B

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Question 24

A vector A has a magnitude of 5 units and makes an angle of 60° with the x-axis. If a vector B has a magnitude of 3 units and makes an angle of 30° with the x-axis, calculate the magnitude of the resul\tant vector A + B.

A. 5.5 units

B. 6.5 units

Correct C. 7.5 units

D. 8.5 units

Correct Answer: C

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Question 25

A circuit consists of a 10 Ω resistor and a 20 Ω resistor connected in parallel. If a voltage of 20 V is applied across the circuit, calculate the current flowing through the 10 Ω resistor.

A. 1 A

Correct B. 2 A

C. 3 A

D. 4 A

Correct Answer: B

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