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POST UTME BOWEN UNIVERSITY 2019 Physics | Objective

Are you preparing for POST UTME BOWEN 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.

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Question 1

A block of mass 2 kg is susp\ended from a spring with spring cons\tant 100 N/m. If the block is displaced by 0.2 m from its equilibrium position and released from rest, what is the maximum speed of the block?

A. 1.0 m/s

Correct B. 2.0 m/s

C. 3.0 m/s

D. 4.0 m/s

Correct Answer: B

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Question 2

A 200 V, 50 Hz AC source is connected to a 100 Ω resistor. What is the rms value of the current flowing through the resistor?

A. 0.5 A

Correct B. 1.0 A

C. 2.0 A

D. 4.0 A

Correct Answer: B

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Question 3

A gas expands from an initial volume of 0.1 m^3 to a final volume of 0.5 m^3 against an external pressure of 2 atm. What is the work done by the gas?

A. 10 J

B. 20 J

Correct C. 30 J

D. 40 J

Correct Answer: C

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Question 4

A particle moves in a circular path with a cons\tant speed of 5 m/s. If the radius of the circle is 2 m, what is the magnitude of the acceleration of the particle?

A. 1.0 m/s^2

B. 2.0 m/s^2

Correct C. 3.0 m/s^2

D. 4.0 m/s^2

Correct Answer: C

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Question 5

A 10 kg block is placed on a frictionless surface and a horizontal force of 20 N is applied to it. What is the acceleration of the block?

A. 1.0 m/s^2

Correct B. 2.0 m/s^2

C. 3.0 m/s^2

D. 4.0 m/s^2

Correct Answer: B

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Question 6

A gas is enclosed in a container with a movable piston. The gas is heated at cons\tant pressure. Which of the following statements is true?

A. The volume of the gas increases exponentially with temperature.

Correct B. The volume of the gas increases linearly with temperature.

C. The volume of the gas remains cons\tant with temperature.

D. The volume of the gas decreases exponentially with temperature.

Correct Answer: B

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Question 7

A beam of light passes from air into a glass slab. 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 8

A radioactive sample decays at a rate of 0.5% per hour. If the initial activity is 1000 Bq, what is the activity after 2 hours?

Correct A. 900 Bq

B. 950 Bq

C. 975 Bq

D. 990 Bq

Correct Answer: A

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Question 9

A particle moves in a circular path with a radius of 2 m. If the angular velocity is 10 rad/s, what is the linear velocity?

A. 20 m/s

Correct B. 30 m/s

C. 40 m/s

D. 50 m/s

Correct Answer: B

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Question 10

A 100 V AC supply is connected to a 50 Ω resistor. What is the current drawn?

A. 0.5 A

Correct B. 1 A

C. 2 A

D. 5 A

Correct Answer: B

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Question 11

A tuning fork of frequency 256 Hz is placed near a stationary observer. If the speed of sound in air is 343 m/s, calculate the wavelength of the sound wave produced by the tuning fork.

Correct A. 1.34 m

B. 1.34 cm

C. 1.34 km

D. 1.34 μm

Correct Answer: A

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Question 12

A capacitor of capaci\tance 2 μF is connected in series with a resistor of resis\tance 10 kΩ. If a voltage of 12 V is applied across the circuit, calculate the current flowing through the circuit.

Correct A. 1.2 mA

B. 1.2 μA

C. 1.2 A

D. 1.2 kA

Correct Answer: A

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Question 13

A magnetic field of strength 0.5 T is applied to a current-carrying wire of length 2 m. If the current flowing through the wire is 5 A, calculate the force experienced by the wire.

Correct A. 2.5 N

B. 2.5 mN

C. 2.5 μN

D. 2.5 kN

Correct Answer: A

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Question 14

A photon of energy 2.5 eV is incident on a metal surface. If the work function of the metal is 1.5 eV, calculate the kinetic energy of the electron emitted.

Correct A. 1 eV

B. 1.5 eV

C. 2 eV

D. 2.5 eV

Correct Answer: A

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Question 15

A beam of light is incident on a prism of angle 30°. If the angle of incidence is 20°, calculate the angle of re\fraction.

Correct A. 10°

B. 20°

C. 30°

D. 40°

Correct Answer: A

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Question 16

A 2.0 mH inductor is connected in series with a 10 V battery. If the inductor is initially at rest, what is the current in the circuit after 0.1 s?

A. 0.1 A

Correct B. 0.2 A

C. 0.5 A

D. 1.0 A

Correct Answer: B

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Question 17

A ray of light passes through a prism and is re\fracted at an angle of 30°. If the angle of incidence is 20°, what is the angle of emergence?

A. 10°

B. 20°

Correct C. 30°

D. 40°

Correct Answer: C

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Question 18

A container of volume 2.0 L is filled with 1.0 mol of an ideal gas at 300 K. If the gas is heated to 400 K, what is the new volume of the gas?

A. 1.5 L

B. 2.0 L

Correct C. 2.5 L

D. 3.0 L

Correct Answer: C

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Question 19

A sound wave with frequency 200 Hz and amplitude 0.5 m is traveling through a medium with speed 340 m/s. If the wave is reflected off a wall, what is the amplitude of the reflected wave?

A. 0.25 m

Correct B. 0.5 m

C. 0.75 m

D. 1.0 m

Correct Answer: B

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Question 20

A vector \vec{A} has magnitude 5.0 m and direction 30° north of east. If a second vector \vec{B} has magnitude 3.0 m and direction 60° south of west, what is the magnitude of the resul\tant vector \vec{A} + \vec{B}?

A. 4.0 m

B. 5.0 m

Correct C. 6.0 m

D. 7.0 m

Correct Answer: C

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Question 21

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 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 22

A capacitor consists of two parallel plates, each of area 0.1 m^2, separated by a dis\tance of 0.01 m. If the capaci\tance is 10 μF, what is the potential difference between the plates when a charge of 0.01 C is stored?

Correct A. 10 V

B. 20 V

C. 30 V

D. 40 V

Correct Answer: A

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Question 23

A radioactive sample has a half-life of 10 years. If the initial activity is 100 Bq, what is the activity after 20 years?

A. 12.5 Bq

Correct B. 25 Bq

C. 50 Bq

D. 100 Bq

Correct Answer: B

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Question 24

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 100 kPa, what is the final pressure?

A. 200 kPa

Correct B. 150 kPa

C. 100 kPa

D. 50 kPa

Correct Answer: B

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Question 25

A simple harmonic motion has a maximum displacement of 5 m and a period of 2 s. What is the angular frequency?

A. 1.57 rad/s

Correct B. 3.14 rad/s

C. 4.71 rad/s

D. 6.28 rad/s

Correct Answer: B

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