POST UTME NILE UNIVERSITY 2024 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A magnetic field of 0.5 T is applied to a coil of 100 turns and a radius of 0.1 m. If the coil is rotated at a frequency of 50 Hz, calculate the induced emf in the coil.
A. 1.6 V
B. 2.1 V
C. 2.5 V
D. 3.2 V
Question 2
A heat engine operates between two reservoirs at temperatures 400 K and 300 K. The engine has an efficiency of 30%. What is the temperature of the hot reservoir?
A. 500 K
B. 600 K
C. 700 K
D. 800 K
Question 3
A particle of mass 0.5 kg is moving in a circular path of radius 2 m with a cons\tant speed of 4 m/s. If the particle is subjected to a centripetal force of 10 N, calculate the time taken for the particle to complete one revolution.
A. 1.6 s
B. 2.1 s
C. 2.5 s
D. 3.2 s
Question 4
A particle of mass 3 kg is moving in a circular path of radius 4 m with a cons\tant speed of 3 m/s. If the particle is subjected to a centripetal force of 15 N, what is the magnitude of the acceleration of the particle?
A. 10 m/s^2
B. 12 m/s^2
C. 15 m/s^2
D. 20 m/s^2
Question 5
A 2 kg block of ice at 0°C is placed in a 10°C water bath. Assuming the specific heat capacity of ice is 2090 J/(kg°C) and the latent heat of fusion of ice is 334 kJ/kg, calculate the energy required to melt the ice completely.
A. 2.1 kJ
B. 3.4 kJ
C. 4.2 kJ
D. 5.5 kJ
Question 6
A circuit consists of a 10 Ω resistor, a 20 Ω resistor, and a 30 Ω resistor connected in series. What is the equivalent resis\tance of the circuit?
A. 50 Ω
B. 60 Ω
C. 70 Ω
D. 80 Ω
Question 7
A 100 W light bulb is connected to a 220 V power source. If the resis\tance of the bulb is 10 ohms, what is the current flowing through the bulb?
A. 0.5 A
B. 1 A
C. 2 A
D. 4 A
Question 8
A parallel plate capacitor has a capaci\tance of 5 μF. If a potential difference of 10 V is applied across the plates, what is the charge stored on the capacitor?
A. 0.05 C
B. 0.1 C
C. 0.5 C
D. 1 C
Question 9
A block of mass 5 kg is placed on a frictionless surface and a horizontal force of 20 N is applied to it. Calculate the acceleration of the block.
A. 2 m/s^2
B. 4 m/s^2
C. 6 m/s^2
D. 8 m/s^2
Question 10
A simple harmonic motion has a frequency of 2 Hz and an amplitude of 0.5 m. If the initial phase angle is 30 degrees, what is the equation of the motion?
A. x(t) = 0.5\sin\( 4\pi t + \frac{\pi}{6} \)
B. x(t) = 0.5\sin\( 4\pi t - \frac{\pi}{6} \)
C. x(t) = 0.5\cos\( 4\pi t + \frac{\pi}{6} \)
D. x(t) = 0.5\cos\( 4\pi t - \frac{\pi}{6} \)
Question 11
A beam of light passes through a convex lens of focal length $f$. If the object dis\tance is $u$, what is the image dis\tance $v$?
A. 1/v = 1/f - 1/u
B. 1/v = 1/f + 1/u
C. 1/v = 1/f - u
D. 1/v = 1/f + u
Question 12
A wave has a frequency of 50 Hz and a wavelength of 2 m. Calculate the speed of the wave.
A. 100 m/s
B. 200 m/s
C. 300 m/s
D. 400 m/s
Question 13
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
C. 6 m/s^2
D. 8 m/s^2
Question 14
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
B. 12 m/s^2
C. 15 m/s^2
D. 20 m/s^2
Question 15
A body of mass 5 kg is moving with a velocity of 2 m/s. If it is subjected to a force of 10 N, what is the acceleration of the body?
A. 0.5 m/s^2
B. 1 m/s^2
C. 2 m/s^2
D. 5 m/s^2

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