A.C. and D.C generators - 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 1979

On which of the following is the operation of a moving coil galvanometer based?

A. Magnetic effect of electric current
B. Electromagnetic induction
C. Chemical reaction produced by electricity
D. Force on current carrying conductor in a magnetic field
E. Electrical energy and power

Question 4:

• 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

Question 5:

• JAMB 1993

Which of the following devices may be used to step up the voltage in a d.c. circuit?

A. A step-up transformer
B. A d.c. generator
C. A wattmeter
D. An induction coil