POST UTME UNIBEN 2020 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A thermodynamic system is in thermal equilibrium with its surroundings. If the temperature of the surroundings is 300 K, what is the temperature of the system?
A. 250 K
B. 300 K
C. 350 K
D. 400 K
Question 2
A wave has a frequency of 50 Hz and a wavelength of 0.05 m. Calculate the velocity of the wave.
A. 2.5 m/s
B. 5 m/s
C. 10 m/s
D. 25 m/s
Question 3
A wave has a frequency of 20 Hz and a wavelength of 0.5 m. If the wave is traveling in the positive x-direction, what is the direction of the particle velocity?
A. positive x-direction
B. negative x-direction
C. positive y-direction
D. negative y-direction
Question 4
A 1000 W heater is connected to a 220 V AC supply. If the resis\tance of the heater is 100 Ω, calculate the current flowing through it.
A. 2 A
B. 4 A
C. 5 A
D. 10 A
Question 5
A capacitor consists of two parallel plates, each of area 0.1 m^2, separated by a dis\tance of 0.01 m. If the capacitor is charged to a potential difference of 10 V, what is the capaci\tance?
A. 1.6 x 10^-10 F
B. 1.6 x 10^-11 F
C. 1.6 x 10^-12 F
D. 1.6 x 10^-13 F
Question 6
A particle of mass 2 kg is attached to a spring with spring cons\tant 100 N/m. It is displaced by 0.2 m from its equilibrium position and released from rest. Assuming the motion is simple harmonic, calculate the maximum kinetic energy of the particle.
A. 10 J
B. 20 J
C. 30 J
D. 40 J
Question 7
A gas is confined to a cylinder with a movable piston. The gas is heated, and the piston moves up. What is the direction of the force exerted by the gas on the piston?
A. Up
B. Down
C. Left
D. Right
Question 8
A car is traveling at a speed of 20 m/s. If the driver applies the brakes and the car comes to a stop in 5 s, calculate the acceleration of the car.
A. -2 m/s²
B. -4 m/s²
C. -6 m/s²
D. -8 m/s²
Question 9
A body of mass 2 kg is moving with a velocity of 5 m/s. If the force acting on it is 10 N, calculate the acceleration produced.
A. 0.5 m/s^2
B. 1 m/s^2
C. 2 m/s^2
D. 5 m/s^2
Question 10
A quantum particle is confined to a one-dimensional box. The energy levels are given by the equation E_n = \( n^2 * h^2 \) / \( 8 * m * L^2 \). What is the energy of the particle in the ground state?
A. 10 J
B. 20 J
C. 30 J
D. 40 J
Question 11
A wave has a frequency of 50 Hz and a wavelength of 0.2 m. If the wave is traveling in the positive x-direction, what is the direction of the particle velocity?
A. positive x-direction
B. negative x-direction
C. positive y-direction
D. negative y-direction
Question 12
A particle moves in a straight line with an initial velocity of 5 m/s and an acceleration of 2 m/s^2. If the particle is at rest at t = 0, what is its velocity at t = 2 s?
A. 8 m/s
B. 6 m/s
C. 4 m/s
D. 10 m/s
Question 13
A body of mass 2 kg is moving with a velocity of 5 m/s. If the force acting on it is 10 N, calculate the acceleration produced.
A. 0.5 m/s^2
B. 1 m/s^2
C. 2 m/s^2
D. 5 m/s^2
Question 14
A body of mass 2 kg is moving with a velocity of 5 m/s. If the force acting on it is 10 N, calculate the acceleration produced.
A. 0.5 m/s^2
B. 1 m/s^2
C. 2 m/s^2
D. 5 m/s^2
Question 15
A 10 Ω resistor is connected in series with a 20 Ω resistor and a 30 Ω resistor. If a voltage of 12 V is applied across the circuit, calculate the current flowing through the circuit.
A. 0.5 A
B. 1 A
C. 2 A
D. 3 A

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