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POST UTME COVENANT UNIVERSITY 2019 Physics | Objective

Are you preparing for POST UTME COVENANT 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 parallel plate capacitor has plates of area 0.04 m^2 and separation 0.02 m. If the capaci\tance is 8.0 µF, what is the charge on the plates when the potential difference between them is 100 V?

Correct A. 0.32 C

B. 0.16 C

C. 0.64 C

D. 0.08 C

Correct Answer: A

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Question 2

A particle of mass 2.0 kg is moving in a circular path of radius 3.0 m with a cons\tant speed of 4.0 m/s. What is the magnitude of the centripetal acceleration?

A. 10 m/s^2

Correct B. 20 m/s^2

C. 30 m/s^2

D. 40 m/s^2

Correct Answer: B

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Question 3

A convex lens of focal length 20 cm forms an image of an object placed 30 cm in front of it. What is the magnification of the lens?

A. -1/2

Correct B. -1/3

C. -1/4

D. -1/5

Correct Answer: B

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Question 4

A magnetic field of strength 0.5 T is directed perp\endicular to the plane of a circular loop of radius 0.1 m. What is the magnitude of the magnetic moment of the loop?

Correct A. 0.01 A·m^2

B. 0.02 A·m^2

C. 0.03 A·m^2

D. 0.04 A·m^2

Correct Answer: A

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Question 5

A gas at a pressure of 2.0 atm and temperature of 300 K is allowed to expand to a volume of 2.0 m^3. What is the final pressure of the gas?

A. 0.5 atm

Correct B. 1.0 atm

C. 1.5 atm

D. 2.0 atm

Correct Answer: B

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Question 6

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 angular velocity of the particle?

A. 2 rad/s

Correct B. 4 rad/s

C. 6 rad/s

D. 8 rad/s

Correct Answer: B

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Question 7

A gas is confined to a cylinder of volume 0.05 m^3 at a temperature of 300 K. If the gas is heated to a temperature of 400 K, what is the new volume of the gas?

A. 0.06 m^3

B. 0.07 m^3

Correct C. 0.08 m^3

D. 0.09 m^3

Correct Answer: C

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Question 8

A wave has a frequency of 50 Hz and a wavelength of 0.1 m. If the wave is traveling at a speed of 20 m/s, what is the amplitude of the wave?

A. 0.01 m

Correct B. 0.02 m

C. 0.03 m

D. 0.04 m

Correct Answer: B

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Question 9

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

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 10

A simple harmonic motion has a frequency of 2 Hz and an amplitude of 0.1 m. If the motion is started from rest, what is the maximum velocity of the motion?

A. 0.2 m/s

Correct B. 0.4 m/s

C. 0.6 m/s

D. 0.8 m/s

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 with a cons\tant speed of 4 m/s. If the particle is subjected to a centripetal acceleration of 2 m/s^2, what is the magnitude of the net force acting on the particle?

A. 8 N

B. 10 N

Correct C. 12 N

D. 16 N

Correct Answer: C

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Question 12

A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 60° above the horizontal. If the air resis\tance is negligible, 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 13

A quantum particle is described by the wave function \psi(x) = Ae^{ikx}. If the particle is in a one-dimensional box of length L, what is the allowed value of k?

A. \frac{\pi}{L}

Correct B. \frac{2\pi}{L}

C. \frac{3\pi}{L}

D. \frac{4\pi}{L}

Correct Answer: B

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Question 14

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

A. 6.4 units

B. 7.1 units

Correct C. 7.9 units

D. 8.5 units

Correct Answer: C

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Question 15

A simple harmonic motion is described by the equation x(t) = 2\cos\( 3t + \phi \). If the amplitude of the motion is 2 units and the phase angle is \phi = \frac{\pi}{6}, what is the angular frequency of the motion?

A. 1.5 rad/s

Correct B. 2.0 rad/s

C. 2.5 rad/s

D. 3.0 rad/s

Correct Answer: B

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Question 16

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

A. \\omega = \\frac{1}{\\sqrt{m}}

B. \\omega = \\sqrt{\\frac{m}{k}}

C. \omega = \frac{k}{m}

Correct D. \\omega = \\sqrt{\\frac{k}{m}}

Correct Answer: D

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Question 17

A light ray passes from air into a glass slab of re\fractive index μ. If the angle of incidence is θ, find the angle of re\fraction r.

A. \frac{\sin \theta}{\sin r} = \frac{1}{\mu}

Correct B. \frac{\sin \theta}{\sin r} = \mu

C. \frac{\sin \theta}{\sin r} = \frac{\mu}{2}

D. \frac{\sin \theta}{\sin r} = \frac{1}{2}

Correct Answer: B

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Question 18

A block of mass m is moving with velocity v on a frictionless surface. It collides with a stationary block of mass M. Assuming a perfectly elastic collision, find the velocity of the first block after the collision.

A. v' = \frac{mv}{m + M}

Correct B. v' = \frac{2mv}{m + M}

C. v' = \frac{mv}{m - M}

D. v' = \frac{mv}{m + 2M}

Correct Answer: B

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Question 19

A light source is placed at a dis\tance d from a convex lens of focal length f. If the image is formed at a dis\tance u from the lens, find the magnification m of the lens.

A. m = \frac{u}{v} = \frac{d}{f}

Correct B. m = \frac{v}{u} = \frac{f}{d}

C. m = \frac{u}{v} = \frac{f}{d}

D. m = \frac{v}{u} = \frac{d}{f}

Correct Answer: B

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Question 20

A particle of mass m is moving in a circular path of radius r with a cons\tant speed v. Find the centripetal force F acting on the particle.

A. F = \frac{mv}{r}

Correct B. F = \frac{mv^2}{r}

C. F = \frac{mr^2}{v}

D. F = \frac{mv}{r^2}

Correct Answer: B

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Question 21

A block of mass m is placed on a frictionless surface and a horizontal force F is applied to it. If the block starts moving with an acceleration a, find the force F.

A. F = \frac{ma}{2}

Correct B. F = ma

C. F = \frac{2ma}{3}

D. F = \frac{ma}{3}

Correct Answer: B

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Question 22

A light ray passes through a prism of angle A. If the angle of incidence is θ, find the angle of re\fraction r.

A. \sin r = \sin \theta \sin A

Correct B. \sin r = \sin \theta \cos A

C. \sin r = \cos \theta \sin A

D. \sin r = \cos \theta \cos A

Correct Answer: B

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Question 23

A block of mass m is moving with velocity v on a frictionless surface. It collides with a stationary block of mass M. Assuming a perfectly inelastic collision, find the velocity v' of the combined blocks after the collision.

A. v' = \frac{mv}{m - M}

Correct B. v' = \frac{mv}{m + M}

C. v' = \frac{mv}{2\( m + M \)}

D. v' = \frac{mv}{m - 2M}

Correct Answer: B

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Question 24

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 acceleration of the particle?

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 25

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?

Correct A. 20°

B. 30°

C. 40°

D. 50°

Correct Answer: A

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