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POST UTME UNIPORT 2019 Physics | Objective

Are you preparing for POST UTME UNIPORT exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2019 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 with a cons\tant speed of 4 m/s. If the radius of the path is 3 m, calculate the magnitude of the centripetal acceleration.

Correct A. 12 m/s^2

B. 16 m/s^2

C. 20 m/s^2

D. 24 m/s^2

Correct Answer: A

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Question 2

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

A. 20°

Correct B. 25°

C. 30°

D. 35°

Correct Answer: B

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Question 3

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

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 4

A simple harmonic motion has a time period of 2 s. If the amplitude is 5 cm, calculate the maximum velocity.

A. 10 cm/s

Correct B. 20 cm/s

C. 30 cm/s

D. 40 cm/s

Correct Answer: B

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Question 5

A light source is placed 2 m away from a convex lens of focal length 1 m. If the object is moved 1 m closer to the lens, calculate the new image dis\tance.

A. 1 m

Correct B. 2 m

C. 3 m

D. 4 m

Correct Answer: B

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Question 6

A gas is heated from 300 K to 400 K at cons\tant volume. Calculate the change in the number of moles of gas u\sing the ideal gas equation.

A. 0.5 mol

Correct B. 1.0 mol

C. 1.5 mol

D. 2.0 mol

Correct Answer: B

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Question 7

A wave has a frequency of 100 Hz and a wavelength of 0.5 m. Calculate 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 8

A radioactive sample has a half-life of 10 years. If the initial activity is 100 Bq, calculate the activity 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 9

A lens has a focal length of 20 cm. If an object is placed 30 cm in front of the lens, calculate the image dis\tance.

A. 10 cm

Correct B. 20 cm

C. 30 cm

D. 40 cm

Correct Answer: B

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Question 10

A circuit consists of a 12 V battery, a 4 Ω resistor, and a 6 Ω resistor connected in series. Calculate the current flowing through the circuit.

A. 1.5 A

Correct B. 2.0 A

C. 2.5 A

D. 3.0 A

Correct Answer: B

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Question 11

A thermodynamic system undergoes a cyclic process, where the initial and final states are identical. If the net work done on the system is 100 J, and the change in internal energy is -50 J, what is the heat transferred to the system?

Correct A. 150 J

B. -50 J

C. 100 J

D. -100 J

Correct Answer: A

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Question 12

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

Correct A. 0.2 C

B. 0.4 C

C. 0.6 C

D. 0.8 C

Correct Answer: A

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Question 13

A magnetic field is produced by a current-carrying wire. If the current is 5 A and the wire is 0.5 m long, what is the magnetic field strength at a point 0.2 m away from the wire?

A. 0.05 T

Correct B. 0.1 T

C. 0.15 T

D. 0.2 T

Correct Answer: B

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Question 14

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?

Correct A. 20°

B. 30°

C. 40°

D. 50°

Correct Answer: A

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Question 15

A lens has a focal length of 0.2 m. If an object is placed 0.3 m away from the lens, what is the image dis\tance?

A. 0.1 m

Correct B. 0.2 m

C. 0.3 m

D. 0.4 m

Correct Answer: B

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Question 16

A parallel plate capacitor consists of two plates, each of area 0.04 m^2, separated by a dis\tance of 0.02 m. The capaci\tance of the capacitor is 8 nF. If a potential difference of 12 V is applied across the plates, calculate the charge stored on each plate.

A. 0.06 C

Correct B. 0.12 C

C. 0.24 C

D. 0.48 C

Correct Answer: B

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Question 17

A light ray passes through a prism of angle 60° and is re\fracted at an angle of 30°. If the angle of incidence is 45°, calculate the angle of emergence.

Correct A. 20°

B. 30°

C. 45°

D. 60°

Correct Answer: A

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Question 18

A circuit consists of a 12 Ω resistor, a 20 Ω resistor, and a 5 Ω resistor connected in series. If a voltage of 24 V is applied across the circuit, calculate the current flowing through the circuit.

A. 0.5 A

B. 1 A

Correct C. 1.5 A

D. 2 A

Correct Answer: C

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Question 19

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

A. 4 units

B. 5 units

Correct C. 6 units

D. 7 units

Correct Answer: C

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Question 20

A light source is placed 2 m away from a convex lens of focal length 0.5 m. If the light source is moved 1 m closer to the lens, calculate the new image dis\tance.

A. 1 m

Correct B. 2 m

C. 3 m

D. 4 m

Correct Answer: B

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Question 21

A particle of mass $m$ is moving in a circular path of radius $r$ with a cons\tant speed $v$. The particle experiences a centripetal force $F_c$ given by $F_c = \frac{mv^2}{r}$. If the particle's speed is doubled to $2v$, what is the new centripetal force $F_{c,new}$?

A. \frac{2mv^2}{r}

Correct B. \frac{4mv^2}{r}

C. \frac{mv^2}{2r}

D. \frac{mv^2}{4r}

Correct Answer: B

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Question 22

A 2.0 kg block is attached to a horizontal, massless spring with a force cons\tant of 100 N/m. The block is displaced by 0.20 m from its equilibrium position and then released from rest. What is the block's speed when it passes through the equilibrium position?

A. 0.20 m/s

B. 0.50 m/s

Correct C. 1.00 m/s

D. 2.00 m/s

Correct Answer: C

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Question 23

A circuit consists of a 12 V battery, a 4 Ω resistor, and a 6 Ω resistor connected in series. What is the current in the circuit?

A. 0.25 A

B. 0.50 A

Correct C. 1.00 A

D. 2.00 A

Correct Answer: C

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Question 24

A gas is compressed from an initial volume of 2.0 L to a final volume of 1.0 L at a cons\tant temperature of 300 K. What is the work done on the gas?

A. -1.0 J

Correct B. -2.0 J

C. -3.0 J

D. -4.0 J

Correct Answer: B

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Question 25

A 5.0 kg block is moving at a speed of 2.0 m/s on a frictionless surface. What is the block's kinetic energy?

A. 5.0 J

B. 10.0 J

Correct C. 20.0 J

D. 40.0 J

Correct Answer: C

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