UTME 2025 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
An ebonite rod rubbed with fur attracts a glass rod rubbed with silk because
A. ebonite has a negative charge while glass has a positive charge
B. ebonite has a positive charge while glass has a negative charge
C. both have negative charges
D. both have positive charges.
Question 2
In semi-conductors, the carriers of current at room temperature are
A. electrons only
B. electrons and holes
C. holes only
D. electrons and ions.
Question 3
If a container is filled with ice to the brim, what happens to the level of water when the ice completely melts?
A. The water in the glass outflows
B. The level of water drops
C. The level of water remains unchanged
D. The level of water goes up
Question 4
The change in volume when 450 kg of ice is completely melted is [density of ice = \(900kgm^{-3}\), density of water = \(1000kgm^{-3}\)]
A. \( 0.05 \mathrm{~m}^{3} \)
B. \( 0.45 \mathrm{~m}^{3} \)
C. \( 4.50 \mathrm{~m}^{3} \)
D. \( 0.50 \mathrm{~m}^{3} \)
Question 5
A stone of mass 1 kg is dropped from a height of 10 m above the ground and falls freely under gravity. Its Kinetic energy 5 m above the ground is then equal to
A. its kinetic energy on the ground
B. twice its initial potential energy
C. its initial potential energy
D. half its initial potential energy.
Question 6
PQRS is a rectangular cell with PQ perpendicular to the magnetic field as shown in the diagram. If a current flows in the direction PQRS, in what direction will the coil move?
A. Upwards
B. Downwards
C. Towards the north pole
D. Towards the south pole
Question 7
The process whereby the molecules of different substances move randomly is called
A. surface tension.
B. diffusion.
C. capillarity.
D. osmosis.
Question 8
A solid suspended by a piece of string is completely immersed in water. On attempting to lift the solid out of the water, the string breaks when the solid is partly out of the water. This is because
A. the tension in the string decreases as the solid is lifted
B. the mass of the solid has increased
C. the solid apparently weighs less when completely immersed in water than when partially immersed
D. part of the solid still in water is exerting more force on the string
E. the solid is no longer in equilibrium with water.
Question 9
When an atom undergoes a beta decay, the atomic number of the nucleus.
A. decreases by one.
B. increases by one.
C. becomes zero.
D. remains unchanged.
Question 10
The melting point of naphthalene is \( 78^{\circ}C \). What is this temperature in Kelvin?
A. 100 K
B. 351 K
C. 378 K
D. 444 K
Question 11
\( \begin{array}{|c|c|c|c|} \hline & \text{Day 1} & \text{Day 2} & \text{Day 3} \\ \hline \text{Dry} & 30^{\circ} \text{C} & 29^{\circ} \text{C} & 25^{\circ} \ \text{C} \\ \hline \text{Wet} & 22^{\circ} \text{C} & 22^{\circ} \text{C} & 21^{\circ} \text{C} \\ \hline \end{array} \) The readings above are for three consecutive days from a wet and dry bulb hygrometer. It can be concluded that the relative humidity for the three days
A. increased steadily
B. remained unchanged
C. was least on Day 1
D. decreased steadily
Question 12
In a gas experiment, if the volume of the gas is plotted against the reciprocal of the pressure. the unit of the slope of the resulting curve is
A. power.
B. work.
C. temperature.
D. force.
Question 13
When light is incident on an object which is magenta in colour, which of the following colours would be absorbed?
A. Red and blue
B. Green only
C. Red and green
D. Red only
Question 14
Which of the following devices may be used to step up the voltage in a d.c. circuit?
A. A step-up transformer
B. A d.c. generator
C. A wattmeter
D. An induction coil.
Question 15
From the diagram above, if the potential difference across the resistor, capacitor and inductor are 80 V .110 V and 40 V respectively, the effective potential difference is
A. 116.3 V .
B. 50.0 V .
C. 230.0 V
D. 1063 V

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