POST UTME UNILAG 2024 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A magnetic field of 0.5 T is directed perp\endicular to a current-carrying wire. If the current in the wire is 2 A, what is the force exerted on a 0.1 m length of the wire?
A. 0.1 N
B. 0.2 N
C. 0.3 N
D. 0.4 N
Question 2
A ray of light passes from air into a glass slab of re\fractive index 1.5. If the angle of incidence is 30°, what is the angle of re\fraction?
A. 20°
B. 30°
C. 40°
D. 50°
Question 3
A 5 kg block is moving with a velocity of 2 m/s. If the block is subjected to a force of 10 N, what is its acceleration?
A. 0.5 m/s^2
B. 1 m/s^2
C. 2 m/s^2
D. 4 m/s^2
Question 4
A magnetic field is produced by a current-carrying wire. What is the direction of the magnetic field at a point 2 cm away from the wire?
A. Into the page
B. Out of the page
C. Along the wire
D. Perp\endicular to the wire
Question 5
A magnetic field of 0.5 T is applied to a current-carrying wire of length 2 m. If the current is 5 A, what is the force on the wire?
A. 0.25 N
B. 0.5 N
C. 0.75 N
D. 1 N
Question 6
A block of mass 2 kg is attached to a horizontal spring of force 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 7
A circuit consists of a resistor $R$, an inductor $L$, and a capacitor $C$ connected in series. If the circuit is driven by a voltage source of amplitude $V_0$ and frequency $f$, what is the impedance of the circuit?
Question 8
A 100 V AC source is connected to a 20 Ω resistor. If the frequency of the AC source is 60 Hz, what is the rms value of the current flowing through the resistor?
A. 2 A
B. 4 A
C. 6 A
D. 8 A
Question 9
A thermodynamic system is undergoing a process from state $A$ to state $B$. If the system is in equilibrium at state $A$, what is the change in entropy of the system?
A. \( \Delta S = \frac{Q}{T} \)
B. \( \Delta S = \frac{W}{T} \)
C. \( \Delta S = \frac{Q}{T} - \frac{W}{T} \)
D. \( \Delta S = \frac{Q}{T} + \frac{W}{T} \)
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 force?
A. 8 N
B. 12 N
C. 16 N
D. 20 N
Question 11
A light ray passes from air into a glass of re\fractive index 1.5. If the angle of incidence is 30°, what is the angle of re\fraction?
A. 20°
B. 30°
C. 40°
D. 50°
Question 12
A particle of mass 1 kg is moving in a circular path of radius 2 m with a cons\tant speed of 3 m/s. If the particle is subject to a centripetal force of 10 N, what is the magnitude of the acceleration of the particle?
A. 2 m/s^2
B. 4 m/s^2
C. 6 m/s^2
D. 8 m/s^2
Question 13
A particle of mass $m$ is moving in a circular orbit of radius $r$ with a 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. \( \frac{mv}{r} \)
C. \( \frac{m^2v^2}{r^2} \)
D. \( \frac{mv^2}{r^2} \)
Question 14
A heat engine operates between the temperatures of 500 K and 300 K. If the efficiency of the engine is 30%, what is the work done by the engine per cycle?
A. 100 J
B. 200 J
C. 300 J
D. 400 J
Question 15
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 30° above the horizontal. If the acceleration due to gravity is 9.8 m/s^2, what is the maximum height reached by the projectile?
A. 10 m
B. 15 m
C. 20 m
D. 25 m

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: