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POST UTME IGBINEDION UNIVERSITY 2023 Physics | Objective

Are you preparing for POST UTME IGBINEDION UNIVERSITY exams? Reviewing past questions is one of the most effective ways to guarantee a high score. This practice hub features authentic 2023 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 attached to a spring with a force cons\tant of 100 N/m. It is displaced by 0.2 m from its equilibrium position and released from rest. Assuming the motion is simple harmonic, calculate the angular frequency of the particle's motion.

A. 10 rad/s

B. 5 rad/s

Correct C. 20 rad/s

D. 15 rad/s

Correct Answer: C

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Question 2

A block of mass 5 kg is placed on a frictionless surface and attached to a horizontal spring with a force cons\tant of 200 N/m. The block is displaced by 0.1 m from its equilibrium position and released from rest. Assuming the motion is simple harmonic, calculate the maximum speed of the block.

Correct A. 2 m/s

B. 1 m/s

C. 4 m/s

D. 3 m/s

Correct Answer: A

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Question 3

A \tank contains 1000 kg of water at a depth of 10 m below the surface. Calculate the pressure at the bottom of the \tank.

A. 100000 Pa

B. 50000 Pa

Correct C. 200000 Pa

D. 300000 Pa

Correct Answer: C

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Question 4

A radioactive sample has a half-life of 10 years. If the initial activity is 100 Bq, calculate the activity after 20 years.

A. 25 Bq

B. 50 Bq

C. 12.5 Bq

Correct D. 6.25 Bq

Correct Answer: D

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Question 5

A magnetic field of 0.5 T is directed perp\endicular to a current of 2 A. Calculate the force on a wire of length 0.2 m.

Correct A. 0.1 N

B. 0.2 N

C. 0.3 N

D. 0.4 N

Correct Answer: A

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Question 6

A parallel plate capacitor has a capaci\tance of 2 μF. If a potential difference of 10 V is applied across it, calculate the charge stored on each plate.

A. 20 μC

Correct B. 40 μC

C. 60 μC

D. 80 μC

Correct Answer: B

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Question 7

A particle of mass 0.5 kg is moving in a circular path with a radius of 2 m. If it has a speed of 4 m/s, calculate the centripetal force acting on it.

A. 2 N

B. 4 N

Correct C. 6 N

D. 8 N

Correct Answer: C

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Question 8

A circuit consists of a 10 Ω resistor and a 20 Ω resistor connected in series. If a voltage of 12 V is applied across the circuit, calculate the current flowing through the circuit.

A. 0.4 A

Correct B. 0.6 A

C. 0.8 A

D. 1 A

Correct Answer: B

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Question 9

A projectile is launched from the ground with an initial velocity of 20 m/s at an angle of 30° above the horizontal. Calculate the time of flight.

A. 2 s

B. 4 s

Correct C. 6 s

D. 8 s

Correct Answer: C

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Question 10

A capacitor of capaci\tance 100 μF is charged to a potential difference of 10 V. Calculate the energy stored in the capacitor.

A. 0.1 J

Correct B. 0.2 J

C. 0.3 J

D. 0.4 J

Correct Answer: B

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Question 11

A light ray 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°

Correct B. 25°

C. 30°

D. 35°

Correct Answer: B

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Question 12

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 force acting on the particle?

A. 10 N

B. 20 N

Correct C. 30 N

D. 40 N

Correct Answer: C

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Question 13

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?

A. 0.5 A

B. 1 A

Correct C. 1.5 A

D. 2 A

Correct Answer: C

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Question 14

A wave has a frequency of 50 Hz and a wavelength of 0.2 m. What is the speed of the wave?

A. 10 m/s

Correct B. 20 m/s

C. 30 m/s

D. 40 m/s

Correct Answer: B

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Question 15

A body of mass 5 kg is moving with a velocity of 10 m/s. What is its kinetic energy?

A. 250 J

Correct B. 500 J

C. 750 J

D. 1000 J

Correct Answer: B

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Question 16

A 100 V, 50 Hz AC source is connected to a 50 Ω resistor. If the current through the resistor is 2 A, what is the power consumed by the resistor?

A. 100 W

Correct B. 141.4 W

C. 200 W

D. 250 W

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 force acting on the particle?

A. 10 N

Correct B. 16.67 N

C. 20 N

D. 25 N

Correct Answer: B

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Question 18

A heat engine operates between a source at 500 K and a \sink at 300 K. If the engine produces 100 J of work per cycle, what is the efficiency of the engine?

A. 0.1

Correct B. 0.25

C. 0.5

D. 0.75

Correct Answer: B

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Question 19

A convex lens of focal length 20 cm forms an image of an object at a dis\tance of 30 cm from the lens. What is the magnification of the lens?

A. -0.5

Correct B. -0.67

C. -0.8

D. -1

Correct Answer: B

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Question 20

A sound wave of frequency 200 Hz has a speed of 340 m/s. What is the wavelength of the sound wave?

A. 1 m

Correct B. 1.7 m

C. 2 m

D. 3 m

Correct Answer: B

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Question 21

A solid sphere of radius $R$ is made of a material with density $\rho$. It is placed in a liquid of density $sigma$. The sphere floats with $x$ portion of its volume submerged in the liquid. What is the ratio of the density of the sphere to the density of the liquid?

Correct A. x/$ 1-x $

B. 1/$ 1-x $

C. x/$ 1+x $

D. 1/$ 1+x $

Correct Answer: A

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Question 22

A heat engine operates between the temperatures $T_1 = 500 K$ and $T_2 = 300 K$. The engine has an efficiency of $\eta = 0.3$. What is the temperature of the hot reservoir?

A. 400 K

B. 500 K

Correct C. 600 K

D. 700 K

Correct Answer: C

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Question 23

A particle of mass $m$ is confined to a one-dimensional box of length $L$. The particle is in the ground state. What is the energy of the particle?

Correct A. h^2/$ 8mL^2 $

B. h^2/$ 4mL^2 $

C. h^2/$ 2mL^2 $

D. h^2/$ mL^2 $

Correct Answer: A

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Question 24

A convex lens of focal length $f$ is placed in a beam of light. The lens is oriented such that the incident light is parallel to the principal axis. What is the nature of the image formed by the lens?

Correct A. Real and inverted

B. Virtual and upright

C. Real and upright

D. Virtual and inverted

Correct Answer: A

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Question 25

A particle of mass $m$ is moving in a circular path of radius $r$ with a cons\tant speed $v$. What is the magnitude of the force acting on the particle?

Correct A. mv^2/r

B. mv/r

C. mvr

D. mv^2r

Correct Answer: A

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