POST UTME REDEEMERS UNIVERSITY 2025 Physics | Objective
Practice these randomly selected questions to test your readiness.
Question 1
A particle of mass 2 kg is moving in a circular path with a radius of 0.3 m. The particle is moving at a speed of 3 m/s. Calculate the centripetal acceleration of the particle.
Question 2
A parallel plate capacitor has a capaci\tance of 10 μF and is charged to a potential difference of 12 V. If the dis\tance between the plates is doubled, what is the new capaci\tance?
Question 3
A block of mass 4 kg is placed on a frictionless surface and attached to a horizontal spring with a spring cons\tant of 150 N/m. The block is displaced by 0.2 m from its equilibrium position and released from rest. Assuming the motion is simple harmonic, calculate the angular frequency of the block.
Question 4
A 2.5 mH inductor is connected in series with a 3.2 μF capacitor across a 12 V AC source. If the frequency of the source is 50 Hz, calculate the impedance of the circuit.
Question 5
A circuit consists of a 12 V battery, a 4 Ω resistor, and an unknown resistor R. If the current in the circuit is 2 A, what is the value of R?
Question 6
A particle of mass m is confined to a one-dimensional box of length L. If the particle is in the ground state \( n = 1 \), what is the energy \( E_1 \) of the particle?
Question 7
A beam 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.
Question 8
A block of mass 5 kg is placed on a frictionless surface and attached to a horizontal spring with a spring cons\tant of 200 N/m. The block is displaced by 0.3 m from its equilibrium position and released from rest. Assuming the motion is simple harmonic, calculate the potential energy of the block when it has moved 0.2 m from its equilibrium position.
Question 9
A convex lens of focal length 20 cm is placed in contact with a concave lens of focal length -15 cm. If an object is placed 30 cm in front of the convex lens, calculate the image dis\tance.
Question 10
A 100 W light bulb is connected to a 230 V AC supply. If the bulb is connected to the supply through a 10 Ω resistor, what is the current flowing through the bulb?
Question 11
A 5 kg block is attached to a horizontal, massless spring with a force cons\tant of 200 N/m. If the block is displaced by 2 m from its equilibrium position and released from rest, what is the maximum speed of the block?
Question 12
A magnetic field of strength B = 0.5 T is directed perp\endicular to a current-carrying wire of length L = 1 m. If the current in the wire is I = 2 A, what is the force (F) exerted on the wire?
Question 13
A parallel plate capacitor has a capaci\tance of 10 nF and is charged to a potential difference of 5 V. Calculate the energy stored in the capacitor.
Question 14
A particle of mass 2 kg is attached to a spring with a spring cons\tant of 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 kinetic energy of the particle when it has moved 0.1 m from its equilibrium position.
Question 15
A circuit consists of a 12 V battery, a 4 Ω resistor, and an inductor of induc\tance 2 H. The circuit is connected to a switch that is initially open. At time $t=0$, the switch is closed. What is the current in the circuit at time $t=0$?
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