POST UTME ACHIEVERS UNIVERSITY 2022 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A particle of mass 1 kg is moving in a circular path of radius 1 m with a cons\tant speed of 2 m/s. If the particle is subjected to a centripetal force of 4 N, what is the angle between the force and the radius vector at the ins\tant when the particle is at the bottom of its path?
A. 30°
B. 45°
C. 60°
D. 90°
Question 2
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 angle between the force and the radius vector at the ins\tant when the particle is at the top of its path?
A. 30°
B. 45°
C. 60°
D. 90°
Question 3
A particle of mass 1 kg is moving in a straight line with an initial velocity of 5 m/s. If the particle is subjected to a force of 2 N, what is the acceleration of the particle after 2 seconds?
A. 1 m/s^2
B. 2 m/s^2
C. 3 m/s^2
D. 4 m/s^2
Question 4
A 5 μF capacitor is connected in series with a 10 kΩ resistor and a 20 V battery. What is the time cons\tant of the circuit?
A. 0.1 s
B. 0.2 s
C. 0.5 s
D. 1 s
Question 5
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
B. 4 rad/s
C. 6 rad/s
D. 8 rad/s
Question 6
A heat engine operates between a high-temperature reservoir at 500 K and a low-temperature reservoir at 300 K. What is the efficiency of the engine?
A. 0.5
B. 0.6
C. 0.7
D. 0.8
Question 7
A magnetic field of 0.5 T is directed perp\endicular to a current-carrying wire of length 2 m. If the current in the wire is 2 A, what is the force experienced by the wire?
A. 0.5 N
B. 1 N
C. 1.5 N
D. 2 N
Question 8
A body is moving in a straight line with a velocity of 10 m/s. If the body is subjected to a cons\tant acceleration of 2 m/s^2, what is the dis\tance traveled by the body in 5 seconds?
A. 25 m
B. 50 m
C. 75 m
D. 100 m
Question 9
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. Calculate the magnitude of the force acting on the particle.
A. 6 N
B. 12 N
C. 24 N
D. 48 N
Question 10
A p\endulum of length 1 m is released from an initial angle of 30 degrees. If the p\endulum has a period of 2 seconds, what is its angular frequency?
A. 3.14 rad/s
B. 6.28 rad/s
C. 9.42 rad/s
D. 12.57 rad/s
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 centripetal acceleration?
A. 0.5 m/s²
B. 1 m/s²
C. 2 m/s²
D. 4 m/s²
Question 12
A 100 V, 50 Hz AC supply is connected to a 20 Ω resistor. What is the power consumed by the resistor?
A. 100 W
B. 200 W
C. 300 W
D. 400 W
Question 13
A radioactive sample has a half-life of 5 years. If the initial activity is 100 Bq, what is the activity after 15 years?
A. 3.125 Bq
B. 6.25 Bq
C. 12.5 Bq
D. 25 Bq
Question 14
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. 10 m
B. 12 m
C. 15 m
D. 18 m
Question 15
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. 6 m/s^2
B. 8 m/s^2
C. 10 m/s^2
D. 12 m/s^2

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