(a) Electromagnetic Induction - Jamb Physics Past Questions and Answers

Question 1:

• JAMB 2019

If the time of flight is 96seconds, calculate the horizontal range through the point of projection.

A. 84400m
B. 69000m
C. 61440m
D. 24000m

Question 2:

• JAMB 1978

On an a.c generator, which of the following does not apply?

A. Field magnet
B. Commutator
C. Armature
D. Slip rings
E. Carbon brushes

Question 3:

• JAMB 1980

The best material for the core of the primary and secondary coils of an induction coil is

A. Copper, because it has a good conductor of electricity
B. Steel, because it becomes magnetic and retains its magnetism for a long time
C. Rubber, because it is a good insulator and the user is prevented from shock
D. Soft iron, because it becomes magnetic but easily loses its magnetism
E. Glass, because it is transparent

Question 4:

• JAMB 1980

In the process of electrification by induction, the amount of induced charge in relation to the inducing charge is the

A. Same in sign and quantity
B. Same in sign but greater
C. Opposite in sign but greater
D. Opposite in sign but less
E. Opposite in sign but equal

Question 5:

• JAMB 1981

Which of the following is NOT directly associated with direct current (DC)?

A. A dry cell
B. A moving coil galvanometer
C. A transformer
D. A lead- acid accumulator
E. A commutator