Electric energy grade 6

The electric lamp convert the electric energy into ..................

• Kinetic

• Light

• Sound

• Magnetic

The filament of the light bulb is made of ..............

• Copper

• Iron

• Tungsten

• Aluminium

The inner surface of the tube of the fluorescent lamp is covered with .....................

• Mercury

• Copper

• Phosphoric material

• Tungsten

When we connect more than one bulb in parallel to an electric source , the light intensity of the bulbs .............

• decrease

• Increase

• Doesn’t change

If we have three light bulbs and we need to get high light intensity so we must connect them ............

• In series

• In parallel

• Without copper wire

The light bulbs are connected in .............. in house

• Parallel

• Series

• Parallel and series

.......... works as a source of electric current in the electric circuit

• Lamp

• Electric wire

• Battery

• Key

A way of connection in which the light bulbs are connected one after another

• Series connection

• Parallel connection

A way of connection , in which the light bulbs are connected in branching routes.

• Series connection

• Parallel connection

A way of connection , in which the light intensity remains constant

• Series connection

• Parallel connection