POST UTME UNN 2018 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A 100 μF capacitor is connected in series with a 50 Ω resistor. If a 10 V potential difference is applied across the circuit, what is the magnitude of the current flowing through the circuit?
A. 0.1 A
B. 0.2 A
C. 0.3 A
D. 0.4 A
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 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 3
A capacitor of capaci\tance 10 μF is connected to a battery of voltage 12 V. Calculate the energy stored in the capacitor.
A. 0.1 J
B. 0.2 J
C. 0.3 J
D. 0.4 J
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. 6 m/s^2
B. 12 m/s^2
C. 24 m/s^2
D. 48 m/s^2
Question 5
A radioactive sample has a half-life of 5 years. If the initial activity is 100 Bq, what is the activity after 10 years?
A. 12.5 Bq
B. 25 Bq
C. 50 Bq
D. 100 Bq
Question 6
A particle of mass 1 kg is moving in a straight line with a velocity of 5 m/s. If the particle experiences a force of 10 N, what is its acceleration?
A. 1 m/s^2
B. 2 m/s^2
C. 5 m/s^2
D. 10 m/s^2
Question 7
A circuit consists of a 12 V battery, a 4 Ω resistor, and a 6 Ω resistor connected in series. Calculate the current flowing through the circuit.
A. 1.5 A
B. 2 A
C. 2.5 A
D. 3 A
Question 8
A 2.5 kg block of ice at 0°C is placed in a container of water at 80°C. Assuming no heat loss to the surroundings, calculate the mass of water that will freeze in 10 minutes.
A. 0.1 kg
B. 0.2 kg
C. 0.3 kg
D. 0.4 kg
Question 9
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 30° above the horizontal. If the air resis\tance is negligible, what is the maximum height reached?
A. 10 m
B. 20 m
C. 30 m
D. 40 m
Question 10
A sound wave has a frequency of 200 Hz and a wavelength of 0.5 m. What is the speed of the sound wave?
A. 100 m/s
B. 200 m/s
C. 300 m/s
D. 400 m/s
Question 11
A 100 μA current flows through a 10 Ω resistor. If the voltage across the resistor is 10 V, what is the power dissipated?
A. 0.01 W
B. 0.1 W
C. 1 W
D. 10 W
Question 12
A current of 5 A is flowing through a wire of resis\tance 10 Ω. If the wire is connected to a battery of emf 20 V, what is the power consumed by the wire?
A. 50 W
B. 100 W
C. 150 W
D. 200 W
Question 13
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. 4.0 m
B. 5.0 m
C. 6.0 m
D. 7.0 m
Question 14
A particle of mass 2 kg is moving in a circular path with a radius of 3 m. If the particle's velocity is 4 m/s, what is its angular velocity?
A. 0.267 rad/s
B. 1.333 rad/s
C. 2.667 rad/s
D. 4.000 rad/s
Question 15
A particle is moving in a circular path with a cons\tant speed of 5 m/s. If the radius of the circle is 2 m, what is the magnitude of the acceleration of the particle?
A. 2.5 m/s^2
B. 5.0 m/s^2
C. 7.5 m/s^2
D. 10.0 m/s^2

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