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POST UTME ELIZADE UNIVERSITY 2020 Physics | Objective

Are you preparing for POST UTME ELIZADE UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2020 Physics (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1

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

A. 20°

Correct B. 25°

C. 30°

D. 35°

Correct Answer: B

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Question 2

A point charge of 2 μC is placed at the origin. What is the electric potential at a point 0.5 m away from the charge?

A. 100 V

Correct B. 200 V

C. 300 V

D. 400 V

Correct Answer: B

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Question 3

A 10 Ω resistor is connected in series with a 20 Ω resistor. What is the equivalent resis\tance?

A. 10 Ω

B. 20 Ω

Correct C. 30 Ω

D. 40 Ω

Correct Answer: C

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Question 4

A 5 V battery is connected in parallel with a 10 Ω resistor. What is the current drawn from the battery?

A. 0.5 A

Correct B. 1 A

C. 2 A

D. 5 A

Correct Answer: B

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Question 5

A light ray passes through a convex lens with a focal length of 10 cm. If the object dis\tance is 20 cm, what is the image dis\tance?

A. 10 cm

B. 20 cm

Correct C. 30 cm

D. 40 cm

Correct Answer: C

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Question 6

A 2 μF capacitor is connected in series with a 4 Ω resistor and a 10 V AC source. If the frequency of the source is 50 Hz, calculate the current through the circuit u\sing the formula I = \frac{V}{Z}, where Z is the impedance of the circuit.

A. 0.25 A

Correct B. 0.5 A

C. 1 A

D. 2 A

Correct Answer: B

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Question 7

A gas at 300 K has a volume of 2 L. If the temperature is increased to 400 K, calculate the new volume u\sing Charles' Law.

A. 2.5 L

B. 3 L

Correct C. 3.5 L

D. 4 L

Correct Answer: C

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Question 8

A nucleus of mass number 20 has a binding energy of 120 MeV. Calculate the binding energy per nucleon.

A. 6 MeV

B. 8 MeV

Correct C. 10 MeV

D. 12 MeV

Correct Answer: C

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Question 9

A vector A has a magnitude of 5 units and makes an angle of 30° with the x-axis. Calculate the x and y components of the vector.

Correct A. 3 units, 4 units

B. 4 units, 3 units

C. 5 units, 5 units

D. 6 units, 6 units

Correct Answer: A

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Question 10

A capacitor of capaci\tance 10 μF is connected in parallel with a resistor of resis\tance 100 Ω. If a voltage of 20 V is applied across the circuit, calculate the current through the resistor.

A. 0.2 A

Correct B. 0.4 A

C. 0.6 A

D. 0.8 A

Correct Answer: B

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Question 11

A parallel plate capacitor has plates of area 0.04 m^2 and separation 0.02 m. If the capaci\tance is 2.5 x 10^-10 F, what is the charge stored when the potential difference between the plates is 100 V?

Correct A. 2.5 x 10^-7 C

B. 2.5 x 10^-8 C

C. 2.5 x 10^-9 C

D. 2.5 x 10^-10 C

Correct Answer: A

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Question 12

A ray of light passes from air into a glass slab of re\fractive index 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 13

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. 50 Bq

Correct B. 25 Bq

C. 12.5 Bq

D. 6.25 Bq

Correct Answer: B

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Question 14

A particle is projected at an angle of 60° to the horizontal with an initial velocity of 20 m/s. If the acceleration due to gravity is 9.8 m/s^2, what is the time of flight?

A. 2 s

Correct B. 4 s

C. 6 s

D. 8 s

Correct Answer: B

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Question 15

A circuit consists of a 2 Ω resistor and a 4 Ω resistor connected in series. If a voltage of 12 V is applied across the circuit, what is the current flowing through the circuit?

A. 2 A

Correct B. 4 A

C. 6 A

D. 8 A

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 angle between the velocity vector 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. 90°

Correct Answer: C

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Question 17

A convex lens of focal length 20 cm is placed in contact with a concave lens of focal length -15 cm. If an object is placed 30 cm in front of the convex lens, what is the image dis\tance for the combined lens system?

A. 10 cm

Correct B. 20 cm

C. 30 cm

D. 40 cm

Correct Answer: B

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Question 18

A simple p\endulum of length 1.5 m is released from rest at an angle of 30° from the vertical. If the p\endulum is subject to a gravitational acceleration of 9.8 m/s², what is the time period of the p\endulum?

A. 2 s

B. 4 s

Correct C. 6 s

D. 8 s

Correct Answer: C

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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. If the circuit is closed at time t = 0, what is the current in the circuit at time t = 2 s?

A. 1.5 A

Correct B. 2 A

C. 2.5 A

D. 3 A

Correct Answer: B

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Question 20

A current of 5 A flows through a wire of resis\tance 2 Ω. If the wire is connected to a power source of 12 V, what is the power consumed by the wire?

A. 60 W

B. 80 W

Correct C. 100 W

D. 120 W

Correct Answer: C

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Question 21

A parallel plate capacitor has plates of area 0.04 m^2 and separation 0.02 m. The capaci\tance is 2.5 nF. Find the charge stored when the potential difference between the plates is 10 V.

Correct A. 0.05 C

B. 0.1 C

C. 0.15 C

D. 0.2 C

Correct Answer: A

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Question 22

A 100 Hz tuning fork is placed near a stationary source of sound of frequency 100 Hz. If the speed of sound is 343 m/s, what is the wavelength of the sound wave?

Correct A. 3.43 m

B. 6.86 m

C. 10.29 m

D. 14.72 m

Correct Answer: A

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Question 23

A particle moves in a circular path with a cons\tant speed of 5 m/s. If the radius of the path is 2 m, find 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 24

A circuit consists of a 10 Ω resistor and a 20 Ω resistor in series. If a voltage of 12 V is applied across the circuit, find the current flowing through the circuit.

A. 0.4 A

B. 0.6 A

Correct C. 0.8 A

D. 1 A

Correct Answer: C

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Question 25

A vector α has a magnitude of 5 units and makes an angle of 30° with the positive x-axis. Find the x-component of the vector.

Correct A. 2.5 units

B. 3.5 units

C. 4.5 units

D. 5.5 units

Correct Answer: A

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