UTME 2017 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A concave mirror has a radius of curvature of 36 cm. At what distance from the mirror should an object be placed to give a real image three times the size of the object?
A. 12 cm
B. 24 cm
C. 48 cm
D. 108 cm
Question 2
The focal length of a concave mirror is 2.0 cm. If an object is placed 8.0 cm from it, the image is at?
A. 2.7 m
B. 2.3 m
C. 2.5 m
D. 2.0 m
Question 3
When very hot water is poured into two identical thin and thick glass tumblers in equal volumes, the thick one cracks because
A. of the even expansion of glass
B. glass is a good conductor of heat
C. glass is a crystal
D. of the uneven expansion of glass
Question 4
Which of the following is in a neutral equilibrium?
A. A heavy weight suspended on a string
B. The beam of a balance in use
C. A heavy-based table lamp
D. A cone resting on its slant edge
Question 5
The diagram above represents the stress-strain graph for a typical metal rod. What does X represent?
A. Yield point
B. Breaking point
C. Elastic limit
D. Proportional limit
Question 6
A piece of radioactive material contains 1000 atoms. If its half-life is 20 seconds, the time taken for atoms to remain is?
A. 20 seconds
B. 40 seconds
C. 60 seconds
D. 80 seconds
Question 7
A note is called an octave of another note when
A. the notes have the same fundamental frequency
B. its frequency is half of the first note
C. its frequency is twice that of the first note
D. its periodic time is twice that of the first note.
Question 8
An object placed at the bottom of a well full of clear water appears closer to the surface due to
A. refraction
B. reflection
C. an inverter
D. a magnifier
Question 9
Transverse waves can be distinguished from longitudinal waves using the characteristics of
A. diffraction
B. reflection
C. polarization
D. refraction
Question 10
A transformer has 300 turns of wire in the primary coil and 30 turns in the secondary coil. If the input voltage is 100 volts, the output voltage is
A. 10 volts
B. 5 volts
C. 15 volts
D. 20 volts
Question 11
Which of the following graphs shows the correct vector diagram for the circuit above?
Question 12
Two spheres of masses 5.0 kg and 10.0 kg are 0.3 m apart. Calculate the force of attraction between them.
A. \( 3.57 \times 10^{-2} N \)
B. \( 3.71 \times 10^{-8} N \)
C. \( 4.00 \times 10^{-2} N \)
D. \( 3.50 \times 10^{-10} \mathrm{~N} \)
Question 13
The speed of light in air is \( 3 \times 10^{8} \mathrm{~ms}^{-1} \). If the refractive index of light from air-to-water is \( \frac{4}{3} \), then which of the following is the correct value of the speed of light in water?
A. \( 4 \times 10^{8} m s^{-1} \)
B. \( 2.25 \times 10^{8} m s^{-1} \)
C. \( 2.25 \times 10^{8} \mathrm{~ms}^{-2} \)
D. \( \frac{4}{9} \times 10^{-8} \mathrm{~ms}^{-1} \)
Question 14
A boy drags a bag of rice along a smooth horizontal floor with a force of 2 N applied at an angle of \( 60^{\circ} \) to the floor. The work done after a distance of \( 3 m \) is
A. 6 J
B. 4 J
C. 5 J
D. 3 J
Question 15
The inner diameter of a small test tube can be measured accurately using a
A. micrometer screw guage
B. pair of vernier calipers
C. metre rule
D. pair of dividers

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