POST UTME CRAWFORD UNIVERSITY 2020 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A magnetic field of strength 0.5 T is directed along the z-axis. A current of 2 A flows in a circular loop of radius 0.1 m. Determine the torque experienced by the loop.
A. 0.01 Nm
B. 0.02 Nm
C. 0.03 Nm
D. 0.04 Nm
Question 2
A body of mass 5 kg is moving with a velocity of 10 m/s. If it is subjected to a force of 20 N, what is the change in its kinetic energy?
A. 100 J
B. 200 J
C. 300 J
D. 400 J
Question 3
A block of mass 2 kg is attached to a horizontal spring with spring cons\tant 100 N/m. If the block is displaced by 0.1 m from its equilibrium position and released from rest, what is the maximum speed of the block?
A. 0.2 m/s
B. 0.4 m/s
C. 0.6 m/s
D. 0.8 m/s
Question 4
A 2 kg object is moving at 5 m/s. What is its kinetic energy?
A. 12.5 J
B. 25 J
C. 50 J
D. 100 J
Question 5
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 60° above the horizontal. What is the maximum height reached by the projectile?
A. 20 m
B. 32.9 m
C. 50 m
D. 80 m
Question 6
A circuit consists of a 10 Ω resistor, a 20 Ω resistor, and a 30 Ω resistor connected in series. 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. 1.5 A
D. 2 A
Question 7
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 acceleration of 2 m/s^2, what is the tension in the string?
A. 12 N
B. 16 N
C. 20 N
D. 24 N
Question 8
A parallel plate capacitor has plates of area 0.04 m^2 and separation 0.02 m. If the capaci\tance is 8.0 x 10^-10 F, what is the charge stored when the potential difference between the plates is 10 V?
A. 4.0 x 10^-9 C
B. 8.0 x 10^-9 C
C. 1.6 x 10^-8 C
D. 3.2 x 10^-8 C
Question 9
A light ray passes from air into a glass block with a re\fractive index of 1.5. If the angle of incidence is 30°, calculate the angle of re\fraction.
A. 20°
B. 25°
C. 30°
D. 35°
Question 10
A coil of wire with an induc\tance of 10 mH is connected to a 12 V battery through a switch. If the switch is closed at time t = 0, determine the current in the coil at time t = 0.1 s.
A. 0.1 A
B. 0.2 A
C. 0.3 A
D. 0.4 A
Question 11
A gas is heated from 300 K to 400 K at cons\tant volume. What is the change in internal energy?
A. 3000 J
B. 4056 J
C. 6000 J
D. 9000 J
Question 12
A 1000 Hz AC voltage source is connected to a 50 Ω resistor. If the maximum voltage is 100 V, what is the rms voltage?
A. 50 V
B. 70.7 V
C. 100 V
D. 141.4 V
Question 13
A beam of light passes from air into a glass of re\fractive index 1.5. If the angle of incidence is 30°, determine the angle of re\fraction.
A. 20°
B. 25°
C. 30°
D. 35°
Question 14
A gas at 300 K and 1 atm is compressed to 2 atm. What is the new volume?
A. 0.5 L
B. 1 L
C. 2 L
D. 4 L
Question 15
A quantum particle is confined to a one-dimensional box of length 1 m. What is the energy of the particle in the ground state?
A. 1.0 eV
B. 6.025 eV
C. 10.0 eV
D. 20.0 eV

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