grade 6 , con 3 , lesson 3&4

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

• light

• sound

• thermal

• electric

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

• Electricity and sound

• Sound and heat

• Light and sound

The source of electricity in any electric circuit may be

• a metal wire

• a switch

• a battery

• an electric lamp

The electric circuit contains the circuit 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

• open will not flow through

• close will pass through

• close will not pass through

.............is a material that cannot allow electric current to flow through.

• Iron

• Copper

• Plastic

• Cobalt

The electric wires can be made of

• wood plastic

• rubber-wood

• aluminum-copper

• plastic-rubber

The electric wires are covered with as it is

• copper-good conductor of electricity

• plastic-bad conductor of electricity

• iron strong material

• plastic electric conductor