Conversion of energy - 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 1983

Which of the following best describes the energy changes which take place when a steam engine drives a generator which lights a lamp?

A. Heat \( \to \) light \( \to \) sound \( \to \) kinetic
B. Kinetic \( \to \) light \( \to \) heat \( \to \) electricity
C. Heat \( \to \) kinetic\( \to \) electricity \( \to \) heat \( \to \) light
D. Electricity \( \to \) kinetic \( \to \) heat v light
E. Heat \(\ to \) sound \( \to \) kninetic v electricity

Question 3:

• JAMB 1984

A device that converts sound energy into electrical energy is

A. The horn of a motor car
B. An A.C. generator
C. A microphone
D. The telephone
E. Radio waves

Question 4:

• JAMB 1988

A dynamo primarily combines

A. Mechanical energy into electrical energy
B. Electrical energy into kinetic energy
C. Potential energy into kinetic energy
D. Kinetic energy into potential energy