Exam Body

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Subject

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POST UTME SUMMIT UNIVERSITY 2019 Physics | Objective

Are you preparing for POST UTME SUMMIT UNIVERSITY 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 50 Hz, 200 V AC supply is connected across a 100 Ω resistor. Calculate the rms value of the current flowing through the resistor.

Correct A. 10 A

B. 20 A

C. 25 A

D. 30 A

Correct Answer: A

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Question 2

A gas at 300 K and 1 atm expands to 2 atm at cons\tant temperature. Calculate the final volume of the gas.

A. 0.5 m^3

Correct B. 1 m^3

C. 2 m^3

D. 4 m^3

Correct Answer: B

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Question 3

A particle of mass 0.1 kg is moving in a circular path of radius 0.5 m with a speed of 2 m/s. Calculate the centripetal force acting on the particle.

A. 0.1 N

B. 0.5 N

Correct C. 1 N

D. 5 N

Correct Answer: C

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Question 4

A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 60° above the horizontal. Calculate the maximum height reached by the projectile.

A. 10 m

Correct B. 20 m

C. 30 m

D. 40 m

Correct Answer: B

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Question 5

A 2 kg object is moving in a straight line with a velocity of 5 m/s. Calculate the momentum of the object.

A. 10 kg m/s

Correct B. 20 kg m/s

C. 30 kg m/s

D. 40 kg m/s

Correct Answer: B

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Question 6

A parallel plate capacitor has plates of area 0.04 m^2 and separation 0.02 m. If the capaci\tance is 8.0 x 10^-12 F, what is the charge on the plates when the potential difference between them is 100 V?

A. 2.0 x 10^-9 C

Correct B. 4.0 x 10^-9 C

C. 6.0 x 10^-9 C

D. 8.0 x 10^-9 C

Correct Answer: B

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Question 7

A body of mass 2 kg is moving in a circular path of radius 3 m with a speed of 4 m/s. If the force of friction is 10 N, what is the acceleration of the body?

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 8

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?

A. 20°

Correct B. 25°

C. 30°

D. 35°

Correct Answer: B

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Question 9

A current of 2 A flows through a resistor of 4 Ω. What is the power dissipated in the resistor?

A. 8 W

Correct B. 16 W

C. 32 W

D. 64 W

Correct Answer: B

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Question 10

A body of mass 5 kg is moving in a circular path of radius 2 m with a speed of 3 m/s. If the force of friction is 15 N, what is the acceleration of the body?

A. 3 m/s^2

B. 6 m/s^2

Correct C. 9 m/s^2

D. 12 m/s^2

Correct Answer: C

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Question 11

A particle of mass 2 kg is attached to a spring with spring cons\tant 100 N/m. It is displaced by 0.5 m from its equilibrium position and released from rest. Assuming the motion is simple harmonic, calculate the time taken for the particle to reach its maximum speed.

Correct A. \pi/4 s

B. \pi/2 s

C. \pi s

D. 2\pi s

Correct Answer: A

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Question 12

A circuit consists of a 10 Ω resistor, a 20 Ω resistor, and a 5 Ω resistor connected in parallel. A 12 V battery is connected across the circuit. Calculate the current through the 10 Ω resistor.

Correct A. 0.6 A

B. 0.8 A

C. 1.2 A

D. 1.5 A

Correct Answer: A

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Question 13

A body of mass 5 kg is moving in a circular path of radius 2 m with a cons\tant speed of 4 m/s. Calculate the force acting on the body.

A. 10 N

Correct B. 20 N

C. 30 N

D. 40 N

Correct Answer: B

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Question 14

A gas expands from an initial volume of 2 L to a final volume of 5 L against an external pressure of 2 atm. Calculate the work done by the gas.

A. 10 J

Correct B. 20 J

C. 30 J

D. 40 J

Correct Answer: B

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Question 15

A particle of mass 3 kg is moving in a straight line with an initial velocity of 2 m/s. It experiences a force of 5 N due to friction. Calculate the acceleration of the particle.

A. 0.5 m/s^2

B. 1 m/s^2

Correct C. 1.5 m/s^2

D. 2 m/s^2

Correct Answer: C

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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 force?

A. 10 N

Correct B. 12 N

C. 15 N

D. 20 N

Correct Answer: B

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Question 17

A 100 W light bulb is connected to a 220 V power source. If the resis\tance of the bulb is 10 ohms, what is the current flowing through the bulb?

A. 2 A

Correct B. 4 A

C. 6 A

D. 8 A

Correct Answer: B

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Question 18

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

B. 20 m/s

Correct C. 30 m/s

D. 40 m/s

Correct Answer: C

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Question 19

A radioactive subs\tance has a half-life of 5 years. If 100 grams of the subs\tance is initially present, how much will be left after 20 years?

A. 10 g

Correct B. 20 g

C. 30 g

D. 40 g

Correct Answer: B

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Question 20

A particle of mass 5 kg is moving in a circular path of radius 2 m with a cons\tant speed of 3 m/s. If the particle is subjected to a centripetal force of 15 N, what is the magnitude of the force?

A. 10 N

B. 12 N

Correct C. 15 N

D. 18 N

Correct Answer: C

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Question 21

A parallel plate capacitor consists of two plates of area A, separated by a dis\tance d. The capaci\tance is given by C = ε0A/d. If the area of the plates is doubled and the dis\tance between them is halved, what is the new capaci\tance?

A. C = 4ε0A/d

Correct B. C = 2ε0A/d

C. C = ε0A/d

D. C = ε0A/2d

Correct Answer: B

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Question 22

A particle of mass m is attached to a spring with spring cons\tant k. The particle is displaced by a dis\tance x from its equilibrium position and released from rest. Assuming the motion is simple harmonic, what is the angular frequency ω?

Correct A. ω = √\( k/m \)

B. ω = √\( m/k \)

C. ω = k/m

D. ω = m/k

Correct Answer: A

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Question 23

A ray of light passes from air into a glass of re\fractive index μ. The angle of incidence is θ1, and the angle of re\fraction is θ2. What is the relationship between θ1 and θ2?

Correct A. μ = \sin(θ1)/\sin(θ2)

B. μ = \sin(θ2)/\sin(θ1)

C. μ = \cos(θ1)/\cos(θ2)

D. μ = \cos(θ2)/\cos(θ1)

Correct Answer: A

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Question 24

A current I flows through a resistor R. The power dissipated in the resistor is given by P = I^2R. If the current is doubled, what is the new power dissipated?

Correct A. P = 4I^2R

B. P = 2I^2R

C. P = I^2R

D. P = I^2/4R

Correct Answer: A

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Question 25

A block of mass m is placed on a frictionless surface and attached to a spring with spring cons\tant k. The block is displaced by a dis\tance x from its equilibrium position and released from rest. Assuming the motion is simple harmonic, what is the period T of the motion?

Correct A. T = 2π√\( m/k \)

B. T = 2π√\( k/m \)

C. T = m/k

D. T = k/m

Correct Answer: A

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