POST UTME BOWEN UNIVERSITY 2024 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A gas is heated from 300 K to 400 K at cons\tant volume. Calculate the change in internal energy u\sing the ideal gas law.
A. 100 J
B. 200 J
C. 300 J
D. 400 J
Question 2
A container of volume 0.5 m³ is filled with an ideal gas at a temperature of 300 K. If the gas is heated to a temperature of 400 K, what is the new volume of the gas?
A. 0.625 m³
B. 0.75 m³
C. 0.875 m³
D. 1 m³
Question 3
A 10 kg object is moving at a speed of 20 m/s in a circular path with a radius of 5 m. If the object experiences a centripetal acceleration of 2 m/s^2, determine the force acting on the object.
A. 20 N
B. 40 N
C. 60 N
D. 80 N
Question 4
A body of mass 2 kg is moving with a velocity of 5 m/s. If a force of 10 N is applied to the body, calculate the acceleration of the body.
A. 0.5 m/s^2
B. 1 m/s^2
C. 2 m/s^2
D. 5 m/s^2
Question 5
A particle of mass $m$ is moving in a circular orbit of radius $r$ under the influence of a magnetic field of strength $B$. If the particle's speed is $v$, what is the magnitude of the magnetic field?
A. \frac{mv}{qr}
B. \frac{mv^2}{qr}
C. \frac{m}{qr}
D. \frac{v}{qr}
Question 6
A radioactive sample has a half-life of 5 years. If the initial activity is 100 Bq, calculate the activity after 10 years.
A. 12.5 Bq
B. 25 Bq
C. 50 Bq
D. 100 Bq
Question 7
A 5 kg block is moving at a speed of 10 m/s on a horizontal surface. If the coefficient of kinetic friction between the block and the surface is 0.2, determine the force of friction acting on the block.
A. 10 N
B. 20 N
C. 30 N
D. 40 N
Question 8
A gas is compressed from an initial volume of 2.0 L to a final volume of 1.0 L at a cons\tant temperature of 300 K. Assuming ideal gas behavior, determine the work done on the gas.
A. -100 J
B. -200 J
C. -300 J
D. -400 J
Question 9
A ray of light passes from air into a glass slab of re\fractive index 1.5. If the angle of incidence is 30°, calculate the angle of re\fraction.
A. 20°
B. 30°
C. 40°
D. 50°
Question 10
A uniform magnetic field of strength 2 T is applied to a coil of wire with 50 turns and a radius of 0.05 m. If the coil is rotated by 90° in 0.1 s, calculate the induced emf u\sing Faraday's law of induction.
A. 0.25 V
B. 0.5 V
C. 1 V
D. 2 V
Question 11
A 2 kg block 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, determine the maximum speed of the block.
A. 0.2 m/s
B. 1.0 m/s
C. 2.0 m/s
D. 5.0 m/s
Question 12
A 100 W bulb is connected to a 230 V mains supply. If the bulb is rated for 2500 hours of operation, how many joules of energy will it consume in that time?
A. 5.25 x 10^6 J
B. 5.75 x 10^6 J
C. 6.25 x 10^6 J
D. 6.75 x 10^6 J
Question 13
A capacitor consists of two parallel plates of area 0.01 m^2 and separation 0.001 m. If a potential difference of 100 V is applied across the plates, calculate the capaci\tance of the capacitor.
A. 1 x 10^-9 F
B. 1 x 10^-8 F
C. 1 x 10^-7 F
D. 1 x 10^-6 F
Question 14
A 5 kg block is attached to a horizontal spring with a force cons\tant of 100 N/m. If the block is displaced by 2 m from its equilibrium position and released, what is its maximum speed?
A. 2 m/s
B. 4 m/s
C. 6 m/s
D. 8 m/s
Question 15
A capacitor of capaci\tance $C$ is charged to a potential difference $V$. If the capacitor is then disconnected from the power source and allowed to discharge through a resistor of resis\tance $R$, what is the time cons\tant of the circuit?
A. RC
B. \frac{RC}{2}
C. \frac{2RC}{3}
D. \frac{3RC}{4}

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Help others prepare! Share this practice hub: