POST UTME UI 2024 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A radioactive sample has a half-life of 10 years. If the initial activity is 100 Bq, what is the activity after 20 years?
A. 12.5 Bq
B. 25 Bq
C. 50 Bq
D. 100 Bq
Question 2
A 1000 W electric heater is connected to a 220 V AC power source. Calculate the current drawn by the heater.
A. 4 A
B. 5 A
C. 6 A
D. 7 A
Question 3
A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 30° above the horizontal. If air resis\tance is neglected, what is the maximum height reached by the projectile?
A. 10 m
B. 15 m
C. 20 m
D. 25 m
Question 4
A radioactive sample decays from 100 g to 50 g in 10 minutes. What is the half-life of the sample?
A. 5 minutes
B. 10 minutes
C. 15 minutes
D. 20 minutes
Question 5
A 5 kg block of ice at -10°C is placed in a 20°C water bath. Assuming the specific heat capacity of ice is 2090 J/kg°C and the latent heat of fusion of ice is 334 kJ/kg, calculate the time it takes for the ice to melt completely.
A. 10 minutes
B. 20 minutes
C. 30 minutes
D. 40 minutes
Question 6
A force of 5 N is applied to an object of mass 2 kg, cau\sing it to accelerate at a rate of 2 m/s^2. What is the net force acting on the object?
A. 4 N
B. 5 N
C. 6 N
D. 8 N
Question 7
A capacitor consists of two parallel plates, each of area 0.1 m^2, separated by a dis\tance of 0.01 m. If the plates are charged to a potential difference of 10 V, what is the capaci\tance of the capacitor?
A. 0.01 F
B. 0.1 F
C. 1 F
D. 10 F
Question 8
A 200 m long string is fixed at both \ends. A 50 Hz wave is produced on the string with an amplitude of 2 cm. Calculate the wavelength of the wave.
A. 400 m
B. 500 m
C. 600 m
D. 700 m
Question 9
A 100 Ω resistor is connected in series with a 200 Ω resistor and a 300 Ω resistor. What is the equivalent resis\tance of the circuit?
A. 100 Ω
B. 200 Ω
C. 300 Ω
D. 600 Ω
Question 10
A 2 kg block is moving in a circular path with a radius of 1 m. If the block is moving at a speed of 3 m/s, what is the centripetal acceleration of the block?
A. 3 m/s²
B. 6 m/s²
C. 9 m/s²
D. 12 m/s²
Question 11
A 10 kg block is moving in a circular path with a radius of 2 m. If the block is moving at a speed of 4 m/s, what is the centripetal force acting on the block?
A. 20 N
B. 40 N
C. 60 N
D. 80 N
Question 12
A block of mass 5 kg is placed on a frictionless surface and 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 from rest, what is the maximum speed of the block?
A. 2 m/s
B. 4 m/s
C. 6 m/s
D. 8 m/s
Question 13
A particle of mass 3 kg is moving in a circular path of radius 4 m with a cons\tant speed of 5 m/s. If the particle is subjected to a centripetal force of 15 N, what is the magnitude of the acceleration of the particle?
A. 10 m/s^2
B. 12 m/s^2
C. 15 m/s^2
D. 18 m/s^2
Question 14
A particle of mass 0.5 kg is moving in a circular path with a radius of 2.0 m. If the particle has a speed of 4.0 m/s, what is the magnitude of the centripetal force acting on the particle?
A. 10 N
B. 20 N
C. 30 N
D. 40 N
Question 15
A 5 kg block is moving in a straight line with a velocity of 2 m/s. If the block experiences a force of 10 N, what is the acceleration of the block?
A. 0.5 m/s²
B. 1.0 m/s²
C. 1.5 m/s²
D. 2.0 m/s²

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