POST UTME DELSU 2017 Physics | Objective

Are you preparing for POST UTME DELSU exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2017 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. What is the magnitude of the centripetal acceleration?
A. 12 m/s^2
Correct B. 16 m/s^2
C. 20 m/s^2
D. 24 m/s^2

Correct Answer: B

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Question 2
A 10 μF capacitor is connected in series with a 5 kΩ resistor and a 9 V battery. What is the time cons\tant of the circuit?
A. 0.5 s
Correct B. 1 s
C. 2 s
D. 5 s

Correct Answer: B

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Question 3
A block of mass 5 kg is attached to a horizontal spring with a force cons\tant of 200 N/m. The block is displaced by 2 m from its equilibrium position and released from rest. What is the maximum speed of the block?
A. 4 m/s
B. 6 m/s
Correct C. 8 m/s
D. 10 m/s

Correct Answer: C

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Question 4
A 100 Ω resistor is connected in parallel with a 200 Ω resistor. What is the equivalent resis\tance of the circuit?
A. 50 Ω
Correct B. 66.67 Ω
C. 100 Ω
D. 200 Ω

Correct Answer: B

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Question 5
A 12 V battery is connected in series with a 4 Ω resistor and a 6 Ω resistor. What is the current in the circuit?
A. 2 A
B. 3 A
Correct C. 4 A
D. 6 A

Correct Answer: C

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Question 6
A radioactive sample of Δₗ emits Δₗα particles. If the half-life of Δₗ is 5.27 × 10¹ years, calculate the activity of the sample after 2.6 × 10¹ years.
A. 1.23 × 10¹ Bq
Correct B. 2.46 × 10¹ Bq
C. 4.69 × 10¹ Bq
D. 9.38 × 10¹ Bq

Correct Answer: B

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Question 7
A convex lens of focal length 20 cm is placed 30 cm to the left of a concave lens of focal length -15 cm. An object is placed 60 cm to the left of the convex lens. Find the position of the final image.
A. 40 cm to the right of the concave lens
B. 50 cm to the right of the concave lens
Correct C. 60 cm to the right of the concave lens
D. 70 cm to the right of the concave lens

Correct Answer: C

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Question 8
A 100 µF capacitor is connected in series with a 200 µF capacitor and a 50 µF inductor. If the frequency of the AC source is 50 Hz, calculate the impedance of the circuit.
A. 150 µF
B. 200 µF
Correct C. 250 µF
D. 300 µF

Correct Answer: C

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Question 9
A particle of mass 2 kg is attached to a spring with a spring cons\tant of 10 N/m. If the particle is displaced by 0.5 m from its equilibrium position and released from rest, calculate the maximum kinetic energy of the particle.
A. 0.5 J
B. 1.0 J
Correct C. 1.5 J
D. 2.0 J

Correct Answer: C

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Question 10
A 10 µF capacitor is connected in parallel with a 20 µF capacitor. If the voltage across the 10 µF capacitor is 50 V, calculate the current through the 20 µF capacitor.
A. 0.5 A
Correct B. 1.0 A
C. 1.5 A
D. 2.0 A

Correct Answer: B

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Question 11
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 acceleration of 2 m/s^2, what is the magnitude of the force acting on the particle?
A. 8 N
B. 10 N
Correct C. 12 N
D. 16 N

Correct Answer: C

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Question 12
A gas is contained in a cylinder of volume 2 L at a temperature of 300 K. If the pressure of the gas is 2 atm, what is the number of moles of the gas present?
A. 0.1 mol
Correct B. 0.2 mol
C. 0.3 mol
D. 0.4 mol

Correct Answer: B

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Question 13
A magnetic field of 0.5 T is applied to a current-carrying wire of length 2 m. If the current in the wire is 2 A, what is the magnitude of the force acting on the wire?
A. 0.5 N
B. 1 N
Correct C. 2 N
D. 4 N

Correct Answer: C

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Question 14
A particle of mass 1 kg is moving in a straight line with a velocity of 5 m/s. If the particle is subjected to a force of 2 N, what is the acceleration of the particle?
A. 1 m/s^2
Correct B. 2 m/s^2
C. 3 m/s^2
D. 4 m/s^2

Correct Answer: B

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Question 15
A simple harmonic motion has a maximum displacement of 2 m and a period of 4 s. If the motion starts from its equilibrium position, what is the amplitude of the motion?
A. 1 m
Correct B. 2 m
C. 3 m
D. 4 m

Correct Answer: B

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Question 16
A radioactive sample of uranium-238 decays into thorium-234 with a half-life of 4.5 billion years. If the initial mass of uranium-238 is 100 g, what is the mass of thorium-234 after 9 billion years?
A. 0.25 g
Correct B. 0.5 g
C. 1 g
D. 1.5 g

Correct Answer: B

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Question 17
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. What is the magnitude of the centripetal acceleration?
A. 0.5 m/s^2
B. 1 m/s^2
Correct C. 2 m/s^2
D. 4 m/s^2

Correct Answer: C

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Question 18
A convex lens of focal length 20 cm is used to form an image of an object placed 30 cm away from the lens. What is the magnification of the image?
A. 0.5
Correct B. 1
C. 2
D. 3

Correct Answer: B

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Question 19
A magnetic field of strength 0.5 T is applied to a current-carrying wire of length 2 m. If the current in the wire is 2 A, what is the magnitude of the force experienced by the wire?
A. 0.1 N
B. 0.2 N
Correct C. 0.5 N
D. 1 N

Correct Answer: C

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Question 20
A photon of energy 2 eV is incident on a metal surface with work function 1 eV. What is the maximum kinetic energy of the photoelectron?
A. 0.5 eV
B. 1 eV
Correct C. 1.5 eV
D. 2 eV

Correct Answer: C

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Question 21
A parallel plate capacitor has plates of area 0.04 m^2, separated by a dis\tance of 0.02 m. If the capaci\tance is 2.5 x 10^-10 F, what is the charge on the plates when the potential difference between them is 100 V?
A. 1.25 x 10^-8 C
Correct B. 2.5 x 10^-8 C
C. 5.0 x 10^-8 C
D. 7.5 x 10^-8 C

Correct Answer: B

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Question 22
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
Correct B. 25 Bq
C. 50 Bq
D. 100 Bq

Correct Answer: B

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Question 23
A sound wave has a frequency of 200 Hz and a wavelength of 0.5 m. What is the speed of the sound wave?
A. 100 m/s
Correct B. 200 m/s
C. 300 m/s
D. 400 m/s

Correct Answer: B

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Question 24
A particle is projected at an angle of 60° to the horizontal with an initial velocity of 20 m/s. If the acceleration due to gravity is 9.8 m/s^2, what is the time of flight?
A. 1.5 s
Correct B. 2.0 s
C. 2.5 s
D. 3.0 s

Correct Answer: B

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Question 25
A force of 10 N is applied to an object, cau\sing it to accelerate at 2 m/s^2. What is the mass of the object?
A. 2.5 kg
Correct B. 5.0 kg
C. 7.5 kg
D. 10 kg

Correct Answer: B

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