UTME 2024 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
Alternating current can induce voltage because it has a
A. ripple value
B. weaker magnetic field than direct current
C. varying magnetic field
D. stronger magnetic field than direct current
Question 2
A device that converts sound energy into electrical energy is
A. a loudspeaker
B. the horn of a motor car
C. an A.C. generator
D. the telephone ear-piece
Question 3
A calorimeter of thermal capacity 80 J contains 20 g of water at \( 25^{\circ} \mathrm{C} \). Water at \( 100^{\circ} \mathrm{C} \) is added so that the final temperature of the set-up is \( 50^{\circ} \mathrm{C} \). The amount of water added is
A. 20 g
B. 25 g
C. 45 g
D. 50 g
Question 4
The following are some units I. NS II. Nm III. \( \mathrm{Nm}^{-2} \) IV. \( \mathrm{J}^{\circ} \mathrm{K}^{-1} \) V. \( \mathrm{JKg}^{-1} \) What are the units of latent heat?
A. I
B. II
C. IV
D. V
Question 5
The total capacitance of the circuit above is
A. \( 0.25 m F \)
B. 1.50 mF
C. \( 0.75 m F \)
D. 1.25 mF
Question 6
A transformer has a primary coil with 500 turns and a secondary coil with 2502 turns. When the voltage input to the primary coil is \( 120^{ ext{'}} \), the output is
A. 6000V
B. 600V
C. 240V
D. 60V
Question 7
Which of the following is most strongly deflected by a magnetic field?
A. \( \lambda \)-rays
B. \( \chi \)-particles
C. \( \beta \)-particles
D. X-rays.
Question 8
A 50.0 kg block is dropped on a spring from a point 10 m as shown in the diagram. If the force constant of the spring is \( 4.0 \times 10^{4} \mathrm{Nm}^{-1} \), find the maximum compression of the spring. \( \quad\left[\mathrm{~g}=10 \mathrm{~ms}^{-2}\right] \)
A. 1.25 m
B. 0.50 m
C. 0.25 m
D. \( 0.05 \mathrm{~m}\)
Question 9
A man stands on a spring scale placed in a lift. The lift descends at constant velocity. As a result, the scale reads a weight
A. greater than the weight of the man
B. the same as the weight of the man
C. of zero
D. less than the weight of the man
Question 10
The angle between the magnetic meridian and the geographic meridian at a locality on the earth is the
A. longitude of the locality
B. angle of inclination at the locality
C. latitude of the locality
D. angle of declination of the locality.
Question 11
The difference of potential between the terminals of a cell is 2.2 volts. When a 4 ohm resistor is connected across the terminals of this cell, the potential difference is 2 volts. What is the internal resistance of the cell?
A. 0.10 ohms
B. 0.25 ohms
C. 2.50 ohms
D. 0.40 ohms
Question 12
The lowest note emitted by a stretched string has a frequency of 40 Hz. How many overtones are there between 40 Hz and 150 Hz?
A. 1
B. 2
C. 3
D. 4
Question 13
When a fixed mass of an ideal gas expands at constant temperature, which property of the gas molecules increases?
A. Average number per unit volume
B. Average number of collisions per unit time
C. Average speed
D. Average separation
Question 14
A man clapping his hands at regular intervals observes that the echo of a clap coincides with the next clap. If the reflecting cliff is 160 m away and the speed of sound is \( 320 \mathrm{~ms}^{-1} \), what is the frequency of the clapping?
A. \( 1 \mathrm{~Hz} \quad \)
B. \( 2 \mathrm{~Hz} \quad \)
C. 4 Hz
D. 8 Hz
Question 15
A rod of length 10 cm is heated through \( 100^{\circ} \mathrm{C} \) and its final length is 10.26 cm. What is the co-efficient of linear expansion of the rod?
A. 0.026 per degree centigrade
B. 0.06026 per degree centigrade
C. 0.26 per degree centigrade
D. 1.0026 per degree

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