UTME 2019 Physics | Objective

Practice these randomly selected questions to test your readiness.

Question 1
If negative charges are induced on an electroscope and a positively charged rod is brought near the cap of the electroscope, the leaves will
A. become negatively charged
B. become positively charged
C. close up
D. open further
Question 2
The vacuum in a thermos flask helps to reduce heat transfer by
A. convection and radiation
B. convection and conduction
C. conduction and radiation
D. radiation only
Question 3
Counting of currency notes with moist fingers is based on the principles of
A. diffusion
B. cohesion
C. viscosity
D. adhesion
Question 4
Lenz's law is a law of the conservation of
A. momentum
B. energy
C. electric current
D. electric charge
Question 5
In the circuit diagram, calculate the current through the \( 12-\Omega \) resistor if the e.m.f. is 12 V and the internal resistance is 1 \( \Omega \).
A. 2.4 A
B. 1.0 A
D. 0.8 A
Question 6
What types of mirrors are capable of producing parallel beams of light such as those arising from the headlamps of a car?
A. cylindrical mirrors
B. spherical mirrors
C. parabolic mirrors
D. plane mirrors
Question 7
Which of the following are true of atoms?
A. Atoms are indestructible
B. The number of protons equals the number of electrons
C. Atoms of different substances have different weights
D. All of the above
Question 8
Water shows anomalous behavior
A. below \( 0^{\circ}\text{C} \)
B. above \( 100^{\circ}\text{C} \)
C. at exactly \( 4^{\circ}\text{C} \)
D. between \( 0^{\circ}\text{C} \) and \( 4^{\circ}\text{C} \)
Question 9
The diagram above shows a magnet with its pole moved along a soft-iron bar PQ in the direction shown. After some time, the poles at P and Q respectively are
A. North-South
B. North-North
C. South-North
D. South-South
Question 10
One of the conditions necessary for an object to be in equilibrium when acted upon by a number of parallel forces is that the vector sum of the forces is
A. zero
B. negative
C. positive
D. average
Question 11
Which of the following is a property of steel?
A. It can easily be magnetized and demagnetized
B. It can be used for making permanent magnets
C. It cannot retain its magnetism longer than iron
D. It can be used for making temporary magnets
Question 12
The force required to make an object of mass \( m \), travelling with velocity \( v \), turn in a circle of radius \( r \) is
A. \( \frac{mr^{2}}{v} \)
B. \( \frac{mv^{2}}{r} \)
C. \( \frac{mr}{v} \)
D. \( \frac{mv}{r^{2}} \)
Question 13
One special advantage of alcohol over mercury as a thermometric liquid is its
A. low density
B. low boiling point
C. high specific heat capacity
D. low freezing point
Question 14
If current flows in the direction of the arrows in the solenoid above, the North pole is at
A. P
B. Q
C. X
D. Y
Question 15
A gas would serve as an electrical conductor under
A. reduced pressure and reduced potential
B. increased magnetic field
C. reduced pressure and high current
D. exposure to visible light

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