POST UTME ACHIEVERS UNIVERSITY 2022 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A point charge of +2 μC is placed at the center of a circular loop of radius 0.1 m. What is the electric flux through the loop?
A. 1.1 × 10^6 Nm²/C
B. 1.1 × 10^7 Nm²/C
C. 1.1 × 10^8 Nm²/C
D. 1.1 × 10^9 Nm²/C
Question 2
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 3
A 100 V, 50 Hz AC supply is connected to a 50 Ω resistor. What is the rms value of the current flowing through the resistor?
A. 1 A
B. 2 A
C. 3 A
D. 4 A
Question 4
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 5
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 6
A magnetic field of 0.5 T is directed perp\endicular to the plane of a circular loop of radius 0.1 m. What is the magnetic flux through the loop?
A. 0.01 Wb
B. 0.02 Wb
C. 0.03 Wb
D. 0.04 Wb
Question 7
A circuit consists of a 9 V battery, a 2 Ω resistor, and a 3 Ω resistor connected in parallel. What is the current flowing through the 2 Ω resistor?
A. 3 A
B. 4 A
C. 5 A
D. 6 A
Question 8
A ray of light passes through a prism and is re\fracted. If the angle of incidence is 30° and the angle of re\fraction is 20°, calculate the angle of deviation.
A. 10°
B. 20°
C. 30°
D. 40°
Question 9
A capacitor of capaci\tance 10 μF is connected in series with a resistor of resis\tance 100 Ω. If a voltage of 20 V is applied across the circuit, calculate the current flowing through the circuit.
A. 0.2 mA
B. 0.4 mA
C. 0.6 mA
D. 0.8 mA
Question 10
A particle of mass 1 kg is projected at an angle of 60° to the horizontal with an initial velocity of 10 m/s. Calculate the time of flight.
A. 2 s
B. 4 s
C. 6 s
D. 8 s
Question 11
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 12
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 force?
A. 10 N
B. 12 N
C. 15 N
D. 20 N
Question 13
A beam of light passes from air into a glass slab of re\fractive index 1.5. If the angle of incidence is 30°, what is the angle of re\fraction?
A. 20°
B. 25°
C. 30°
D. 35°
Question 14
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 15
A block of mass 5 kg is susp\ended from a spring with a spring cons\tant of 200 N/m. If the block is displaced by 0.2 m from its equilibrium position and released, what is the maximum velocity of the block?
A. 0.5 m/s
B. 1 m/s
C. 1.5 m/s
D. 2 m/s

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