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POST UTME COAL CITY UNIVERSITY 2017 Physics | Objective

Are you preparing for POST UTME COAL CITY 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.

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Question 1

A charged particle moves through a uniform magnetic field. If the particle's velocity is perp\endicular to the magnetic field, what is the direction of the force exerted on the particle?

A. towards the magnetic field

B. away from the magnetic field

Correct C. perp\endicular to the magnetic field

D. along the magnetic field

Correct Answer: C

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Question 2

A circuit consists of a resistor, an inductor, and a capacitor connected in series. If the frequency of the AC source is increased, what happens to the impedance of the circuit?

A. decreases

Correct B. increases

C. remains the same

D. becomes zero

Correct Answer: B

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Question 3

A sound wave with a frequency of 200 Hz is traveling through a medium. If the speed of the wave is 340 m/s, what is the wavelength of the wave?

Correct A. 1.7 m

B. 1.7 cm

C. 1.7 km

D. 1.7 mm

Correct Answer: A

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Question 4

A capacitor consists of two parallel plates separated by a dis\tance of 1 mm. If the charge on the plates is 10 μC, what is the potential difference between the plates?

Correct A. 10 V

B. 100 V

C. 1000 V

D. 10000 V

Correct Answer: A

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Question 5

A simple harmonic motion has a frequency of 5 Hz and an amplitude of 2 m. If the initial phase angle is 30°, what is the equation of the motion?

Correct A. ( x(t) = 2 \cos \( 10pi t + \frac{pi}{6} \) )

B. ( x(t) = 2 \sin \( 10pi t + \frac{pi}{6} \) )

C. ( x(t) = 2 \cos \( 10pi t - \frac{pi}{6} \) )

D. ( x(t) = 2 \sin \( 10pi t - \frac{pi}{6} \) )

Correct Answer: A

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Question 6

A 10 Ω resistor, a 20 μF capacitor, and a 50 mH inductor are connected in series across a 120 V AC source. If the frequency of the source is 50 Hz, calculate 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 7

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

A. 0.2 m/s

B. 0.4 m/s

Correct C. 0.6 m/s

D. 0.8 m/s

Correct Answer: C

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Question 8

A 100 W bulb is connected to a 220 V AC source. If the bulb is rated for 5 A, calculate the power factor of the bulb.

A. 0.5

Correct B. 0.6

C. 0.7

D. 0.8

Correct Answer: B

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Question 9

A parallel plate capacitor has a capaci\tance of 10 μF. If a potential difference of 100 V is applied across the plates, calculate the charge stored on the capacitor.

A. 0.1 C

Correct B. 0.2 C

C. 0.3 C

D. 0.4 C

Correct Answer: B

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Question 10

A 50 Hz AC source is connected to a 10 Ω resistor. If the current flowing through the resistor is 5 A, calculate the power consumed by the resistor.

A. 25 W

Correct B. 50 W

C. 75 W

D. 100 W

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. What is the magnitude of the force acting on the particle?

A. 12 N

B. 16 N

Correct C. 20 N

D. 24 N

Correct Answer: C

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Question 12

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

Correct B. 20 m/s

C. 30 m/s

D. 40 m/s

Correct Answer: B

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Question 13

A gas is heated from 20°C to 50°C. What is the change in temperature in Kelvin?

A. 10 K

Correct B. 20 K

C. 30 K

D. 40 K

Correct Answer: B

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Question 14

A body of mass 5 kg is moving with a velocity of 10 m/s. What is its kinetic energy?

A. 50 J

Correct B. 100 J

C. 150 J

D. 200 J

Correct Answer: B

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Question 15

A car is traveling at a speed of 60 km/h. What is its acceleration if it takes 10 seconds to cover a dis\tance of 50 m?

A. 2 m/s^2

B. 4 m/s^2

C. 6 m/s^2

Correct D. 8 m/s^2

Correct Answer: D

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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 acceleration of the particle?

Correct A. 6 m/s^2

B. 12 m/s^2

C. 24 m/s^2

D. 48 m/s^2

Correct Answer: A

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Question 17

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 plates are charged to a potential difference of 10 V, what is the capaci\tance of the capacitor?

Correct A. 0.01 F

B. 0.1 F

C. 1 F

D. 10 F

Correct Answer: A

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Question 18

A block of mass 5 kg is placed on a frictionless surface and a horizontal force of 20 N is applied to it. If the block starts from rest and moves with a cons\tant acceleration of 4 m/s^2, what is the work done on the block?

Correct A. 80 J

B. 160 J

C. 240 J

D. 320 J

Correct Answer: A

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Question 19

A circuit consists of a 12 V battery, a 4 ohm resistor, and a 6 ohm resistor connected in series. If the current in the circuit is 2 A, what is the power dissipated in the 6 ohm resistor?

A. 12 W

B. 24 W

Correct C. 36 W

D. 48 W

Correct Answer: C

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Question 20

A spring with a spring cons\tant of 100 N/m is stretched by 0.2 m. If the spring is then released and allowed to oscillate, what is the maximum speed of the spring?

Correct A. 10 m/s

B. 20 m/s

C. 30 m/s

D. 40 m/s

Correct Answer: A

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Question 21

A body of mass 2 kg is moving with a velocity of 5 m/s. If the body is subjected to a force of 10 N, what is its acceleration?

A. 2 m/s^2

B. 5 m/s^2

Correct C. 10 m/s^2

D. 15 m/s^2

Correct Answer: C

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Question 22

A wave has a frequency of 50 Hz and a wavelength of 0.5 m. What is its velocity?

A. 20 m/s

B. 25 m/s

Correct C. 30 m/s

D. 35 m/s

Correct Answer: C

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Question 23

A gas is heated from 20°C to 50°C. If the initial volume is 2 L, what is the final volume?

A. 4 L

B. 5 L

Correct C. 6 L

D. 7 L

Correct Answer: C

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Question 24

A ray of light 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 25

A body is in equilibrium under the action of three forces. If the magnitude of two forces is 10 N and the magnitude of the third force is 20 N, what is the angle between the two forces?

A. 30°

Correct B. 45°

C. 60°

D. 75°

Correct Answer: B

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