POST UTME AL-HIKMAH UNIVERSITY 2019 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A body of mass 5 kg is moving in a circular path of radius 2 m with a cons\tant speed of 4 m/s. Calculate the magnitude of the acceleration of the body.
A. 10 m/s²
B. 20 m/s²
C. 30 m/s²
D. 40 m/s²
Question 2
A circuit consists of a 9.0 V battery, a 2.0 Ω resistor, and an inductor of induc\tance 0.50 H. What is the time cons\tant of the circuit?
A. 0.10 s
B. 0.20 s
C. 0.30 s
D. 0.40 s
Question 3
A heat engine operates between a temperature of 400 K and a temperature of 200 K. If the efficiency of the engine is 40%, what is the work done by the engine?
A. 150 J
B. 200 J
C. 250 J
D. 300 J
Question 4
A gas occupies a volume of 2 L at a pressure of 1 atm and a temperature of 300 K. Calculate the volume of the gas at a pressure of 2 atm and a temperature of 400 K.
A. 4 L
B. 6 L
C. 8 L
D. 10 L
Question 5
A wave with a frequency of 200 Hz has a wavelength of 2 m. Calculate the speed of the wave.
A. 400 m/s
B. 600 m/s
C. 800 m/s
D. 1000 m/s
Question 6
A radioactive sample has a half-life of 10 years. If the initial activity of the sample is 100 Bq, what is the activity of the sample after 20 years?
A. 25 Bq
B. 50 Bq
C. 75 Bq
D. 100 Bq
Question 7
A particle of mass m is moving in a circular path of radius r under the influence of a centripetal force F. If the particle's velocity is increased by a factor of 2, what is the new centripetal force required?
A. 4F
B. 2F
C. F
D. F/2
Question 8
A heat engine operates between a temperature of 500 K and a temperature of 300 K. If the efficiency of the engine is 30%, what is the work done by the engine?
A. 100 J
B. 200 J
C. 300 J
D. 400 J
Question 9
A radioactive sample decays from 100g to 50g in 5 years. What is the half-life of the sample?
A. 10 years
B. 5 years
C. 2.5 years
D. 1 year
Question 10
A body of mass 5 kg is moving in a circular path of radius 2 m with a cons\tant speed of 4 m/s. Calculate the magnitude of the force acting on the body.
A. 20 N
B. 30 N
C. 40 N
D. 50 N
Question 11
A sound wave with a frequency of 200 Hz has a wavelength of 1.5 m. Calculate the speed of the sound wave.
A. 300 m/s
B. 600 m/s
C. 900 m/s
D. 1200 m/s
Question 12
A 10V battery is connected to a 2Ω resistor. What is the current flowing through the resistor?
A. 5A
B. 2.5A
C. 1A
D. 0.5A
Question 13
A parallel plate capacitor consists of two plates of area 0.1 m², separated by a dis\tance of 0.01 m. The capaci\tance of the capacitor is 10 nF. If a potential difference of 10 V is applied across the plates, calculate the charge stored on the capacitor.
A. 10 μC
B. 20 μC
C. 30 μC
D. 40 μC
Question 14
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 60 degrees above the horizontal. Calculate the time of flight of the projectile.
A. 2 s
B. 4 s
C. 6 s
D. 8 s
Question 15
A 12 V battery is connected to a 4 Ω resistor in series with a 6 Ω resistor. Calculate the total resis\tance in the circuit.
A. 2 Ω
B. 4 Ω
C. 6 Ω
D. 10 Ω

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