POST UTME ESUT 2018 Physics | Objective

Are you preparing for POST UTME ESUT exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2018 Physics (Objective) questions designed to simulate the real exam environment.

Practice these randomly selected questions to test your readiness.

Question 1
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. 10 N
Correct B. 12 N
C. 15 N
D. 20 N

Correct Answer: B

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Question 2
A wave has a frequency of 50 Hz and a wavelength of 2 m. If the wave is traveling at a speed of 100 m/s, what is the amplitude of the wave?
Correct A. 0.1 m
B. 0.2 m
C. 0.3 m
D. 0.4 m

Correct Answer: A

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Question 3
A radioactive sample has an initial activity of 100 Bq. If the half-life of the sample is 10 minutes, what is the activity of the sample after 20 minutes?
Correct A. 25 Bq
B. 50 Bq
C. 75 Bq
D. 100 Bq

Correct Answer: A

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Question 4
A car is traveling at a speed of 50 km/h. If the car accelerates at a rate of 2 m/s^2 for 10 seconds, what is the final velocity of the car?
A. 52 m/s
B. 54 m/s
Correct C. 56 m/s
D. 58 m/s

Correct Answer: C

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Question 5
A block of mass 5 kg is attached to a horizontal spring with a spring cons\tant of 100 N/m. If the block is displaced by 2 m from its equilibrium position and released, what is the maximum velocity of the block?
A. 2 m/s
B. 4 m/s
Correct C. 6 m/s
D. 8 m/s

Correct Answer: C

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Question 6
A 50 Hz, 200 V AC source is connected to a series RLC circuit with R = 100 Ω, L = 0.2 H, and C = 10 μF. What is the impedance of the circuit at resonance?
A. 50 Ω
B. 100 Ω
Correct C. 200 Ω
D. 250 Ω

Correct Answer: C

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Question 7
A sound wave with a frequency of 200 Hz has a maximum displacement of 1 mm. What is the amplitude of the wave?
A. 0.1 mm
B. 0.5 mm
Correct C. 1 mm
D. 5 mm

Correct Answer: C

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Question 8
A heat engine operates between a high-temperature reservoir at 500 K and a low-temperature reservoir at 300 K. If the engine has an efficiency of 30%, what is the temperature of the high-temperature reservoir?
A. 400 K
B. 500 K
Correct C. 600 K
D. 700 K

Correct Answer: C

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Question 9
A point charge of +2 μC is placed at the origin of a coordinate system. What is the electric potential at a point 2 m away from the charge?
A. 100 V
B. 200 V
Correct C. 400 V
D. 800 V

Correct Answer: C

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Question 10
A magnetic field of 0.5 T is applied to a coil of 100 turns and 0.1 m radius. What is the magnetic flux through the coil?
A. 0.01 Wb
B. 0.05 Wb
Correct C. 0.1 Wb
D. 0.5 Wb

Correct Answer: C

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Question 11
A uniform rod of length 2m and mass 5kg is susp\ended from one \end. If the rod is displaced by 30° from its equilibrium position, what is the magnitude of the torque acting on the rod?
A. 15 Nm
B. 20 Nm
Correct C. 25 Nm
D. 30 Nm

Correct Answer: C

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Question 12
A parallel plate capacitor has a capaci\tance of 10 μF and is connected to a 12 V battery. If the dis\tance between the plates is doubled, what is the new capaci\tance?
A. 20 μF
B. 15 μF
C. 10 μF
Correct D. 5 μF

Correct Answer: D

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Question 13
A gas at 300 K and 1 atm expands to 2 times its original volume. What is the new temperature of the gas?
A. 400 K
B. 500 K
Correct C. 600 K
D. 700 K

Correct Answer: C

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Question 14
A resistor of 10 Ω and an inductor of 5 H are connected in series. If a 12 V battery is connected across the circuit, what is the initial current in the circuit?
A. 1 A
B. 2 A
C. 3 A
Correct D. 4 A

Correct Answer: D

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Question 15
A capacitor of 20 μF is connected to a 50 Hz AC source. What is the reac\tance of the capacitor?
A. 100 Ω
B. 200 Ω
Correct C. 300 Ω
D. 400 Ω

Correct Answer: C

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Question 16
A 50 Ω resistor is connected in series with a 100 V battery. If the internal resis\tance of the battery is 5 Ω, what is the current flowing through the circuit?
A. 1 A
Correct B. 2 A
C. 3 A
D. 4 A

Correct Answer: B

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Question 17
A heat engine operates between two temperatures, 500 K and 300 K. If the engine has an efficiency of 30%, what is the temperature of the hot reservoir?
Correct A. 400 K
B. 500 K
C. 600 K
D. 700 K

Correct Answer: A

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Question 18
A wave has a frequency of 100 Hz and a wavelength of 0.5 m. What is the speed of the wave?
A. 50 m/s
Correct B. 100 m/s
C. 150 m/s
D. 200 m/s

Correct Answer: B

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Question 19
A particle of mass 2 kg is moving in a circular path with a radius of 1 m. If the particle has a speed of 5 m/s, what is the centripetal force acting on it?
A. 10 N
B. 20 N
Correct C. 30 N
D. 40 N

Correct Answer: C

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Question 20
A photon has an energy of 2 eV. What is its momentum?
A. 0.1 kg m/s
Correct B. 0.2 kg m/s
C. 0.3 kg m/s
D. 0.4 kg m/s

Correct Answer: B

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Question 21
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 subject to a centripetal force of 12 N, what is the magnitude of the acceleration of the particle?
A. 8 m/s^2
Correct B. 16 m/s^2
C. 32 m/s^2
D. 64 m/s^2

Correct Answer: B

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Question 22
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?
Correct A. 20°
B. 30°
C. 40°
D. 50°

Correct Answer: A

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Question 23
A circuit consists of a 12 V battery, a 4 Ω resistor, and a 6 Ω resistor connected in series. What is the current flowing through the circuit?
Correct A. 1.2 A
B. 2.4 A
C. 3.6 A
D. 4.8 A

Correct Answer: A

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Question 24
A wave has a frequency of 50 Hz and a wavelength of 0.2 m. What is the speed of the wave?
A. 5 m/s
Correct B. 10 m/s
C. 15 m/s
D. 20 m/s

Correct Answer: B

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Question 25
A body of mass 5 kg is moving with a velocity of 10 m/s. If it is subject to a force of 20 N, what is the acceleration of the body?
A. 2 m/s^2
B. 4 m/s^2
Correct C. 6 m/s^2
D. 8 m/s^2

Correct Answer: C

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