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POST UTME RHEMA UNIVERSITY 2017 Physics | Objective

Are you preparing for POST UTME RHEMA UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2017 Physics (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1

A 10 Ω resistor is connected in series with a 20 Ω resistor and a 30 Ω resistor. If a 12 V battery is connected across the circuit, what is the current flowing through the 10 Ω resistor?

A. 0.4 A

Correct B. 0.6 A

C. 0.8 A

D. 1.2 A

Correct Answer: B

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Question 2

A gas is heated from 300 K to 400 K at cons\tant volume. If the initial volume is 2 L, what is the final volume?

A. 2 L

B. 4 L

Correct C. 6 L

D. 8 L

Correct Answer: C

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Question 3

A 50 Hz AC voltage is applied across a circuit containing a 10 Ω resistor and a 20 μF capacitor in series. If the initial phase angle is 30°, what is the current flowing through the circuit?

A. 2 A

B. 3 A

Correct C. 4 A

D. 5 A

Correct Answer: C

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Question 4

A particle of mass 2 kg is attached to a spring with a spring cons\tant of 100 N/m. If the particle is displaced by 0.5 m from its equilibrium position and released from rest, what is the maximum velocity of the particle?

A. 1 m/s

Correct B. 2 m/s

C. 3 m/s

D. 4 m/s

Correct Answer: B

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Question 5

A 1000 Ω resistor is connected in parallel with a 2000 Ω resistor. If a 12 V battery is connected across the circuit, what is the current flowing through the 1000 Ω resistor?

Correct A. 0.4 A

B. 0.6 A

C. 0.8 A

D. 1.2 A

Correct Answer: A

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Question 6

A parallel plate capacitor has a capaci\tance of 2 μF. If a potential difference of 10 V is applied across the plates, calculate the charge stored on each plate.

A. 20 μC

Correct B. 40 μC

C. 80 μC

D. 160 μC

Correct Answer: B

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Question 7

A current of 5 A flows through a resistor of 10 Ω. Calculate the power dissipated in the resistor.

Correct A. 25 W

B. 50 W

C. 100 W

D. 200 W

Correct Answer: A

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Question 8

A light ray passes through a convex lens of focal length 20 cm. If the object dis\tance is 30 cm, calculate 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 9

A gas occupies a volume of 2 L at a pressure of 1 atm. If the temperature is increased to 300 K, calculate the new volume.

A. 4 L

Correct B. 6 L

C. 8 L

D. 10 L

Correct Answer: B

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Question 10

A circuit consists of a 10 Ω resistor and a 20 Ω resistor connected in series. If a current of 2 A flows through the circuit, calculate the voltage drop across the 20 Ω resistor.

A. 10 V

B. 20 V

Correct C. 30 V

D. 40 V

Correct Answer: C

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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 force?

A. 16 N

Correct B. 12 N

C. 8 N

D. 24 N

Correct Answer: B

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Question 12

A heat engine operates between the temperatures of 500 K and 300 K. If the engine absorbs 1000 J of heat from the high-temperature reservoir, what is the efficiency of the engine?

A. 0.25

Correct B. 0.30

C. 0.35

D. 0.40

Correct Answer: B

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Question 13

A light ray passes from air into a glass of re\fractive index 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 14

A particle of mass 1 kg is moving in a straight line with a velocity of 5 m/s. If a force of 10 N is applied to the particle, what is the acceleration of the particle?

A. 1 m/s²

B. 2 m/s²

C. 5 m/s²

Correct D. 10 m/s²

Correct Answer: D

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Question 15

A heat engine operates between the temperatures of 400 K and 200 K. If the engine absorbs 800 J of heat from the high-temperature reservoir, what is the efficiency of the engine?

A. 0.20

Correct B. 0.25

C. 0.30

D. 0.35

Correct Answer: B

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Question 16

A 2.5 mH inductor is connected in series with a 10 Ω resistor and a 20 V AC source. If the frequency of the source is 50 Hz, what is the impedance of the circuit?

A. 10 Ω

B. 20 Ω

Correct C. 30 Ω

D. 40 Ω

Correct Answer: C

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Question 17

A particle of mass 0.5 kg is projected from the origin with an initial velocity of 20 m/s at an angle of 60° to the horizontal. What is the time of flight of the particle?

A. 2 s

Correct B. 4 s

C. 6 s

D. 8 s

Correct Answer: B

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Question 18

A 100 Ω resistor and a 200 Ω resistor are connected in parallel across a 200 V AC source. What is the current drawn from the source?

A. 0.5 A

Correct B. 1 A

C. 1.5 A

D. 2 A

Correct Answer: B

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Question 19

A 2 kg block is moving with a velocity of 10 m/s on a frictionless surface. If a force of 5 N is applied to the block, what is its acceleration?

A. 1 m/s²

Correct B. 2 m/s²

C. 3 m/s²

D. 4 m/s²

Correct Answer: B

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Question 20

A 10 μF capacitor is connected in series with a 20 Ω resistor and a 50 V AC source. If the frequency of the source is 100 Hz, what is the current drawn from the source?

A. 0.5 A

Correct B. 1 A

C. 1.5 A

D. 2 A

Correct Answer: B

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Question 21

A parallel plate capacitor has plates of area 0.04 m^2 and separation 0.02 m. If the dielectric cons\tant of the material between the plates is 3, calculate the capaci\tance.

A. 1.6 x 10^-10 F

Correct B. 3.2 x 10^-10 F

C. 4.8 x 10^-10 F

D. 6.4 x 10^-10 F

Correct Answer: B

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Question 22

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 23

A sound wave has a frequency of 200 Hz and a wavelength of 0.5 m. Calculate the speed of the wave.

A. 100 m/s

Correct B. 200 m/s

C. 300 m/s

D. 400 m/s

Correct Answer: B

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Question 24

A radioactive sample has a half-life of 10 years. If the initial activity is 1000 Bq, calculate the activity after 20 years.

Correct A. 250 Bq

B. 500 Bq

C. 750 Bq

D. 1000 Bq

Correct Answer: A

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Question 25

A vector has a magnitude of 5 units and makes an angle of 60° with the x-axis. Calculate the x and y components of the vector.

Correct A. x = 4, y = 3

B. x = 3, y = 4

C. x = 4, y = 4

D. x = 3, y = 3

Correct Answer: A

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