Practice Post UTME JOSEPH AYO BABALOLA UNIVERSITY physics 2017 Past Questions

Question 1

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 2

A 10 μF capacitor is connected in series with a 20 Ω resistor and a 50 V battery. What is the current flowing through the circuit?

A. 1 A

B. 2 A

Correct C. 2.5 A

D. 3 A

Correct Answer: C

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Question 3

A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 30° above the horizontal. What is the maximum height reached by the projectile?

A. 4 m

B. 5 m

Correct C. 5.2 m

D. 6 m

Correct Answer: C

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Question 4

A gas occupies a volume of 2 L at a pressure of 1 atm and a temperature of 20°C. What is the volume of the gas at a pressure of 2 atm and a temperature of 30°C?

A. 1.5 L

B. 2 L

Correct C. 2.07 L

D. 2.5 L

Correct Answer: C

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Question 5

A 100 W light bulb is connected to a 220 V power source. What is the current flowing through the bulb?

A. 0.4 A

Correct B. 0.45 A

C. 0.5 A

D. 0.6 A

Correct Answer: B

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Question 6

A parallel plate capacitor has plates of area 0.04 m^2, separated by a dis\tance of 0.02 m. The capaci\tance is 2.5 nF. If the potential difference between the plates is 10 V, what is the charge on the positive plate?

Correct A. 6.25 \u00b5 C

B. 12.5 \u00b5 C

C. 25 \u00b5 C

D. 50 \u00b5 C

Correct Answer: A

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Question 7

A particle of mass 0.5 kg is moving in a circular path of radius 0.2 m with a cons\tant speed of 2 m/s. What is the magnitude of the force acting on the particle?

A. 0.1 N

B. 0.2 N

Correct C. 0.5 N

D. 1 N

Correct Answer: C

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Question 8

A 1000-turn coil of wire is placed in a magnetic field of strength 0.5 T. If the coil is rotated through an angle of 90°, what is the induced emf?

A. 250 V

Correct B. 500 V

C. 750 V

D. 1000 V

Correct Answer: B

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Question 9

A 2 m long wire is carrying a current of 5 A. If the magnetic field strength at a dis\tance of 0.5 m from the wire is 0.2 T, what is the direction of the magnetic field?

A. Into the page

Correct B. Out of the page

C. Along the wire

D. Perp\endicular to the wire

Correct Answer: B

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Question 10

A 1000 Hz AC voltage source is connected to a 50 Ω resistor. What is the current flowing through the resistor?

A. 10 A

B. 20 A

Correct C. 50 A

D. 100 A

Correct Answer: C

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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 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 12

A 100 V, 50 Hz AC supply is connected across a 20 Ω resistor. What is the rms value of the current flowing through the resistor?

A. 1 A

Correct B. 2 A

C. 5 A

D. 10 A

Correct Answer: B

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Question 13

A sound wave with a frequency of 200 Hz has a speed of 340 m/s. What is the wavelength of the sound wave?

Correct A. 1.7 m

B. 1.8 m

C. 1.9 m

D. 2.0 m

Correct Answer: A

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Question 14

A 10 kg block is moving with a velocity of 5 m/s. If a force of 20 N is applied to the block, what is the acceleration of the block?

A. 0.5 m/s^2

B. 1.0 m/s^2

Correct C. 2.0 m/s^2

D. 5.0 m/s^2

Correct Answer: C

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Question 15

A 100 V, 50 Hz AC supply is connected across a 20 Ω resistor. What is the power consumed by the resistor?

Correct A. 100 W

B. 200 W

C. 500 W

D. 1000 W

Correct Answer: A

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Question 16

A parallel plate capacitor consists of two plates, each of area 0.04 m^2, separated by a dis\tance of 0.02 m. The capaci\tance of the capacitor is 8.0 nF. If a potential difference of 10 V is applied across the plates, calculate the charge stored on each plate.

A. 4.0 \mu C

Correct B. 8.0 \mu C

C. 16.0 \mu C

D. 32.0 \mu C

Correct Answer: B

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Question 17

A particle of mass 2.0 kg is moving in a circular path of radius 3.0 m with a speed of 4.0 m/s. If the particle is subjected to a centripetal force of 10 N, calculate the time taken by the particle to complete one revolution.

Correct A. 2.0 s

B. 4.0 s

C. 6.0 s

D. 8.0 s

Correct Answer: A

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Question 18

A gas is contained in 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, calculate the final volume of the gas, given that the initial pressure is 1.0 atm.

A. 0.06 m^3

Correct B. 0.07 m^3

C. 0.08 m^3

D. 0.09 m^3

Correct Answer: B

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Question 19

A beam of light is incident on a glass slab at an angle of 30°. If the re\fractive index of the glass is 1.5, calculate the angle of re\fraction.

A. 20°

Correct B. 25°

C. 30°

D. 35°

Correct Answer: B

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Question 20

A circuit consists of a 10 Ω resistor, a 20 Ω resistor, and a 30 Ω resistor connected in series. If a voltage of 12 V is applied across the circuit, calculate the current flowing through the circuit.

A. 0.4 A

B. 0.6 A

C. 0.8 A

Correct D. 1.0 A

Correct Answer: D

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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 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 22

A gas is heated from 300 K to 400 K at cons\tant volume. If the initial pressure is 2 atm, what is the final pressure?

A. 2.5 atm

Correct B. 3 atm

C. 4 atm

D. 5 atm

Correct Answer: B

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Question 23

A 10 Ω resistor is connected in series with a 20 Ω resistor and a 30 Ω resistor. If a voltage of 12 V is applied across the circuit, what is the current flowing through the 10 Ω resistor?

Correct A. 0.4 A

B. 0.6 A

C. 0.8 A

D. 1 A

Correct Answer: A

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Question 24

A convex lens of focal length 20 cm is used to form an image of an object placed 30 cm away from the lens. What is the magnification of the image?

A. 0.5

Correct B. 1

C. 2

D. 3

Correct Answer: B

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Question 25

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

A. 1.7 m

Correct B. 1.8 m

C. 1.9 m

D. 2 m

Correct Answer: B

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