UTME 2017 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A typical transistor characteristic is represented as?
Question 2
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 3
A sonometer wire of length 100 cm under a tension of 10 N has a frequency of 250 Hz. Keeping the length of the wire constant, the tension is adjusted to produce a new frequency of 350 Hz. The new tension is
A. 5.1 N
B. 19.6 N
C. 14.0 N
D. 7.1 N
Question 4
Which of the following is the dimension of pressure?
A. \( \mathrm{ML}^{2} \mathrm{~T}^{-3} \)
B. \( \mathrm{MLT}^{-2} \)
C. \( \mathrm{ML}^{-1} \mathrm{~T}^{-2} \)
D. \( \mathrm{ML}^{-3} \)
Question 5
Which of the following statements correctly describe(s) cathode rays? \( I. \) They consist of tiny particles carrying negative electric charges. \( II. \) They are deflected in a magnetic field but not in an electric field. \( III. \) They consist of fast moving neutrons and are deflected in an electric field.
A. I only
B. III only
C. I and II only
D. II and III only
Question 6
A metallic strip of iron and brass was heated. Which of the following diagrams accurately illustrates the shape of the strip after heating?
Question 7
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 8
The correct expression for the potential at a point distance r from a charge \( q \), in an electric field is?
A. \( \frac{q}{4 \pi \epsilon_{0} r} \)
B. \( \frac{q}{4 \pi \epsilon_{0} r^{r^{2}}} \)
C. \( \frac{q^{2}}{4 \pi \epsilon_{0} r^{2}} \)
D. \( x \frac{q^{2}}{4 \pi \epsilon_{0} r} \)
Question 9
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 10
The specific latent heat of vaporization of a substance is always
A. less than its specific latent heat of fusion
B. equal to its specific latent heat of fusion
C. greater than its specific heat of fusion
D. all of the above depending on the nature of the substance.
Question 11
Which of the following pairs of light rays shows the widest separation in the spectrum of white light?
A. Green and yellow
B. Blue and red
C. Indigo and violet
D. Orange and red
Question 12
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 13
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 14
The net capacitance in the circuit shown above is
A. \( 8.0 \mu F \)
B. \( 6.0 \mu F \)
C. \( 2.0 \mu F \)
D. \( 4.0 \mu F \)
Question 15
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

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