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POST UTME VERITAS UNIVERSITY 2022 Physics | Objective

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Question 1 View Details

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 uniform magnetic field of magnitude 2 T directed perp\endicular to the plane of the circular path, what is the magnitude of the magnetic force acting on the particle?

A. 6 N

Correct B. 8 N

C. 10 N

D. 12 N

Correct Answer: B

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Question 2 View Details

A heat engine operates between two reservoirs at temperatures 500 K and 300 K. If the engine absorbs 200 J of heat from the high-temperature reservoir in one cycle, 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 3 View Details

A photon of wavelength 600 nm is incident on a metal surface. If the work function of the metal is 2.5 eV, what is the maximum kinetic energy of the photoelectrons emitted?

A. 1.5 eV

Correct B. 2.0 eV

C. 2.5 eV

D. 3.0 eV

Correct Answer: B

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Question 4 View Details

A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 30° above the horizontal. If air resis\tance is neglected, 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 5 View Details

A resistor of 10 Ω is connected in series with a capacitor of 100 μF and an inductor of 50 mH. If an AC voltage of 100 V is applied across the circuit, what is the impedance of the circuit?

A. 15 Ω

B. 20 Ω

Correct C. 25 Ω

D. 30 Ω

Correct Answer: C

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Question 6 View Details

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. 10 m/s^2

Correct B. 12 m/s^2

C. 15 m/s^2

D. 20 m/s^2

Correct Answer: B

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Question 7 View Details

A light ray 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 8 View Details

A radioactive sample decays at a rate of 0.05% per minute. If the initial activity is 1000 Bq, what is the activity after 10 minutes?

A. 900 Bq

B. 950 Bq

C. 975 Bq

Correct D. 990 Bq

Correct Answer: D

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Question 9 View Details

A projectile is launched at an angle of 45° with an initial velocity of 20 m/s. 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 10 View Details

A 5 kg block is attached to a horizontal spring with a force cons\tant of 100 N/m. If the block is displaced by 2 m from its equilibrium position and released, what is the maximum speed of the block?

A. 2 m/s

B. 4 m/s

Correct C. 6 m/s

D. 8 m/s

Correct Answer: C

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Question 11 View Details

A block of mass 5 kg is placed on a horizontal, frictionless surface. A horizontal force of 20 N is applied to the block. If the block starts from rest, what is its velocity after 2 seconds?

A. 10 m/s

Correct B. 20 m/s

C. 5 m/s

D. 4 m/s

Correct Answer: B

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Question 12 View Details

A gas is compressed from an initial volume of 2 m^3 to a final volume of 1 m^3. If the initial pressure is 200 kPa, what is the final pressure?

Correct A. 400 kPa

B. 200 kPa

C. 100 kPa

D. 50 kPa

Correct Answer: A

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Question 13 View Details

A wave has a frequency of 50 Hz and a wavelength of 2 m. What is its speed?

Correct A. 100 m/s

B. 50 m/s

C. 200 m/s

D. 25 m/s

Correct Answer: A

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Question 14 View Details

A particle is moving in a circular path with a radius of 3 m. If it completes one revolution in 2 seconds, what is its angular velocity?

Correct A. 1.5 rad/s

B. 3 rad/s

C. 0.5 rad/s

D. 6 rad/s

Correct Answer: A

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Question 15 View Details

A simple harmonic motion has a maximum displacement of 2 m and a period of 4 seconds. What is its angular frequency?

A. 1.5 rad/s

Correct B. 3 rad/s

C. 0.5 rad/s

D. 6 rad/s

Correct Answer: B

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Question 16 View Details

A 5 kg block is attached to a horizontal, massless spring with a force cons\tant of 200 N/m. The block is displaced by 0.2 m from its equilibrium position and released from rest. Assuming the block undergoes simple harmonic motion, calculate the maximum speed of the block as it passes through the equilibrium position.

A. 2 m/s

B. 4 m/s

Correct C. 6 m/s

D. 8 m/s

Correct Answer: C

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Question 17 View Details

A 100 Ω resistor, a 200 Ω resistor, and a 300 Ω resistor are connected in parallel across a 12 V battery. Calculate the total current drawn from the battery.

A. 0.2 A

B. 0.4 A

Correct C. 0.6 A

D. 0.8 A

Correct Answer: C

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Question 18 View Details

A wave with a frequency of 50 Hz and a wavelength of 2 m is traveling through a medium. 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 19 View Details

A body of mass 2 kg is moving with a velocity of 5 m/s. Calculate the work done by a force of 10 N acting on the body.

A. 50 J

B. 100 J

Correct C. 150 J

D. 200 J

Correct Answer: C

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Question 20 View Details

A block of ice is placed on a frictionless surface and is given an initial velocity of 10 m/s. Assuming the block undergoes uniform acceleration, calculate the time it takes for the block to come to rest.

A. 2 s

B. 4 s

C. 6 s

Correct D. 8 s

Correct Answer: D

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