POST UTME JOSEPH AYO BABALOLA UNIVERSITY 2017 Physics | Objective

Practice these randomly selected questions to test your readiness.

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
C. 6 m/s^2
D. 8 m/s^2
Question 2
A particle of mass 1 kg is moving in a circular path with a radius of 2 m. The particle has a speed of 4 m/s. Calculate the centripetal 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 3
A radioactive sample has a half-life of 10 years. If the initial activity of the sample is 1000 Bq, calculate the activity of the sample after 20 years.
A. 125 Bq
B. 250 Bq
C. 500 Bq
D. 1000 Bq
Question 4
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 5
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
C. 2.5 A
D. 3 A
Question 6
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
B. 1.8 m
C. 1.9 m
D. 2 m
Question 7
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
C. 2.07 L
D. 2.5 L
Question 8
A 50 Hz AC generator produces an emf given by ( e(t) = E_0 \sin(2 pi ft) ), where \( E_0 = 100 , \text{V} \) and \( f = 50 , \text{Hz} \). Find the maximum value of the current in the circuit if the impedance is \( Z = 10 , Omega \).
A. 2 A
B. 5 A
C. 10 A
D. 20 A
Question 9
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
B. 2 A
C. 5 A
D. 10 A
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
C. 50 A
D. 100 A
Question 11
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
C. 5.2 m
D. 6 m
Question 12
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.
A. 2.0 s
B. 4.0 s
C. 6.0 s
D. 8.0 s
Question 13
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
C. 0.5 N
D. 1 N
Question 14
A sound wave with a frequency of 200 Hz has a speed of 340 m/s. What is the wavelength of the sound wave?
A. 1.7 m
B. 1.8 m
C. 1.9 m
D. 2.0 m
Question 15
A coil of wire has an induc\tance of $L$ and a resis\tance of $R$. If a current of $I$ flows through it, what is the energy stored in the coil?
A. \frac{1}{2}LI^2
B. \frac{1}{2}RI^2
C. \frac{1}{2}LRI
D. \frac{1}{2}L^2I^2

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