How much energy does a 100 W electric bulb transfer in 1 minute?

A. 100 J B. 600 J

C. 3600 J D. 6000 J

An object is falling freely from a height x. After it has fallen a height, it will possess :

A. Only potential energy

B. Only kinetic energy

C. Half potential and half kinetic energy

D. Less potential and more kinetic energy

The commercial unit of energy is:

A. Watt B. Watt-hour

C. Kilowatt-hour D. Kilowatt

The device which converts mechanical energy into energy which runs our microwave oven is:

A. Electric motor

B. Alternator

C. Turbine

D. Electric heater

A microphone converts:

A. Electrical energy into sound energy in ordinary telephone

B. Microwave energy into sound energy in a mobile phone

C. Sound energy into mechanical energy in a stereo system

D. Sound energy into electrical energy in public address system