Practice Post UTME JOSEPH AYO BABALOLA UNIVERSITY physics 2025 Past Questions

Question 1

A photon of energy 2 eV is incident on a metal surface with a work function of 1 eV. What is the maximum kinetic energy of the emitted electron?

A. 0.5 eV

B. 1 eV

C. 1.5 eV

D. 2 eV

Question 2

A parallel plate capacitor consists of two plates, each of area 0.1 m^2, separated by a dis\tance of 0.01 m. The space between the plates is filled with a dielectric material of dielectric cons\tant 2. The capacitor is connected to a battery of emf 10 V. Calculate the capaci\tance of the capacitor.

A. 0.01 F

B. 0.02 F

C. 0.03 F

D. 0.04 F

Question 3

A projectile is launched from the origin with an initial velocity $v_0$ at an angle $\theta$ above the horizontal. If the projectile is subject to a uniform gravitational field of strength $g$, what is the maximum height reached by the projectile?

A. \frac{v_0^2\sin^2\theta}{2g}

B. \frac{v_0^2\cos^2\theta}{2g}

C. \frac{v_0^2\sin\theta}{2g}

D. \frac{v_0^2\cos\theta}{2g}

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. 18 m/s^2

D. 24 m/s^2

Question 5

A charged particle moves through a uniform magnetic field. If the particle's velocity is 5 m/s, the magnetic field strength is 0.5 T, and the charge of the particle is 2 x 10^-19 C, what is the force exerted on the particle?

A. 1 x 10^-15 N

B. 5 x 10^-15 N

C. 1 x 10^-14 N

D. 5 x 10^-14 N

Question 6

A block of mass 5 kg is attached to a spring with a spring cons\tant of 100 N/m. If the block is displaced by 0.2 m from its equilibrium position and released, determine the maximum velocity of the block.

A. 2 m/s

B. 4 m/s

C. 6 m/s

D. 8 m/s

Question 7

A gas is contained in a cylinder of volume $V$ and is heated from temperature $T_1$ to $T_2$. If the gas is ideal and the process is isothermal, what is the change in the internal energy of the gas?

A. \Delta U = 0

B. \Delta U = nC_V$ T_2 - T_1 $

C. \Delta U = nC_P$ T_2 - T_1 $

D. \Delta U = nR$ T_2 - T_1 $

Question 8

A 100 W bulb is connected to a 220 V power source. Calculate the current drawn by the bulb.

A. 0.5 A

B. 1 A

C. 2 A

D. 4 A

Question 9

A spring with a spring cons\tant of 100 N/m is stretched by 2 meters. What is the potential energy stored in the spring?

A. 100 J

B. 200 J

C. 300 J

D. 400 J

Question 10

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. 4 m/s^2

B. 6 m/s^2

C. 8 m/s^2

D. 10 m/s^2

Question 11

A block of mass 2 kg is attached to a horizontal, massless spring with a force cons\tant of 100 N/m. The block is displaced by 0.2 m from its equilibrium position and released from rest. Assuming the block undergoes simple harmonic motion, calculate the maximum speed of the block as it passes through the equilibrium position.

A. 2 m/s

B. 4 m/s

C. 6 m/s

D. 8 m/s

Question 12

A particle of mass $m$ is moving in a circular path of radius $R$ with a cons\tant speed $v$. If the particle is subjected to a uniform magnetic field of strength $B$, what is the magnitude of the magnetic force acting on the particle?

A. \frac{mv^2}{R}

B. \frac{mv^2}{2R}

C. \frac{mv^2}{4R}

D. \frac{mv^2}{8R}

Question 13

A radioactive sample of Uranium-238 undergoes \alpha decay, emitting an \alpha particle. If the initial mass of the sample is 200 g, and the mass of the \alpha particle is 4 u, what is the mass of the resulting nucleus?

A. 196 g

B. 198 g

C. 200 g

D. 202 g

Question 14

A parallel plate capacitor has a capaci\tance of 5 μF and is charged to a potential difference of 10 V. If a dielectric material with a dielectric cons\tant of 3 is inserted between the plates, what is the new capaci\tance of the capacitor?

A. 10 μF

B. 15 μF

C. 20 μF

D. 25 μF

Question 15

A coil of wire of radius 0.05 m is placed in a magnetic field of strength 0.2 T. If the coil has 100 turns and a resis\tance of 10 Ω, what is the induced emf in the coil when the magnetic flux through it changes at a rate of 0.1 Wb/s?

A. -10 V

B. -20 V

C. -30 V

D. -40 V

POST UTME JOSEPH AYO BABALOLA UNIVERSITY 2025 Physics | Objective

Master the Exam!

Help others prepare! Share this practice hub: