UTME 2025 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
Two closed vessels contain equal volumes of boiling water and are identical except that one is blackened on the outside while the other is polished. Which of the following is correct?
A. The polished vessel will cool faster because a polished surface is a good radiator
B. The polished vessel will cool faster because it will absorb less heat from the room
C. The black vessel will cool faster because it is a better conductor of heat
D. The polished vessel will cool faster because it reflects heat better
E. The black vessel will cool faster because a black surface radiates heat faster than a polished one.
Question 2
Which of the following statements on the use of X-rays is incorrect? X-rays are used
A. in hospitals to obtain photographs of tissues and bones in the body
B. for the treatment of malignant growths like cancer cells
C. in detecting fingerprints
D. to reveal hidden flaws in metal castings and welded joints
E. to detect alterations which have been made to works of art.
Question 3
In the circuit diagram above, the ammeter reads a current of 3 amps, when R is 5 ohms and reads 6 amps when R is 2 ohms. The value of the unknown resistance \( X \) is
A. 1
B. 2
C. 3
D. 4
Question 4
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 5
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
Question 6
To convert an alternating current dynamo into a direct current dynamo. the
A. number of turns in the coil is increased
B. strength of the field magnet is increased
C. slip rings are replaced with a split ring commutator
D. coil is wound on a soft iron armature.
Question 7
The equivalent capacitance for the circuit drawn above is
A. \( 18 \mu \mathrm{f} \)
B. \( 4 \mu \mathrm{f} \)
C. \( 2 \mu \mathrm{f} \)
D. \( 12 \mu \mathrm{f} \)
E. \( 13 \mu \mathrm{f} \)
Question 8
A wave of frequency 10 Hz forms a stationary wave pattern in a medium where the velocity is \( 20 \mathrm{cms}^{-1} \). The distance between adjacent nodes is
A. 1.0 cm
B. \( 1.5 \mathrm{~cm} \quad \)
C. \( 2.0 \mathrm{~cm} \quad \)
D. 5.0 cm
Question 9
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 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
An electric iron is rated at 1000 watts, 250 V. The corresponding maximum resistance and accompanying current is
A. 62.5 \(\mathrm{~A} \quad4.0 \Omega \)
B. 16.0\(\mathrm{~A} \quad 62.5 \Omega \quad \)
C. 62.5\(\mathrm{~A} \quad 16.0 \Omega \quad \)
D. 4.0\(\mathrm{~A} \quad 62.5 \Omega \)
E. 4.0\(\mathrm{~A} \quad 250 \Omega \)
Question 12
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 13
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 14
A force varying linearly with the distance acts on a body. The work done on the body by the force during the first 10 metres of motion is
A. 100 J
B. 150 J
C. 200 J
D. 300 J
E. 600 J
Question 15
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.

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Help others prepare! Share this practice hub: