grade 6 , con 3 , lesson 3

Mechanical energy is converted into......in the generator

• light

• sound

• thermal

• electric energy

Generators are used in

• building houses and heating water.

• lighting houses and operating electric devices.

• producing sound energy

• generating thermal energy.

The flow of electric charges along a closed path causes

• electric circuit.

• light energy.

• electric current.

• sound energy.

…....... are used to spin the magnet in the generator to produce electricity

• Water and winds

• Light and sound

• Electricity and sound

• Sound and heat

Magnets are used in generators and

• turbines - sound.

• switches - sound.

• lamps - heat.

• turbines - electricity.

The source of electricity in any electric circuit may be

• a metal wire.

• a switch.

• a battery.

• an electric lamp.

The electric circuit contains.....which is responsible for opening and closing

• a battery

• a switch

• a lamp

• a heater

When the switch is turned off, it...........the circuit, so the electric current

• open - will flow through.

• close - will pass through.

• open - will not flow through.

• close - will not pass through.

All the following materials are considered as electric conductors, except

• copper.

• water.

• rubber.

• iron.

The internal switch on a ....... can be used in the refrigerator to adjust its temperature.

• battery

• Thermostat

• Light bulb

• wall socket