Electric and it's effects

What is used in electric irons, hot plates etc.

• Filament

• Tungsten

• copper

• Element

Which is the alloy used in the element

(a)  

What is the filament made up of?

(a)  

Which of these can be used in electrical wires

• Rubber

• Copper

• Iron

• Lead

• Solid NaCl

What is this symbol for?

• Battery

• bulb

• electric cell

• wire

A fuse wire is a wire of-

• High resistivity and low melting point

• High resistivity and high melting point

• Low resistivity and low melting point

• Low resistivity and high melting point

When current is switched 'on' of a bulb it converts _______ energy into _______ energy.

• Electrical, heat

• Electrical, light

• Electrical, mechanical

• Electrical, sound

When current is switched on in an electric bell, it converts _______ energy into _______ energy.

• Electrical, light

• Electrical, sound

• Electrical, heat

• Mechanical, sound

The magnitude of magnetism produced by an electric current in a wire depends upon- (a) Increases with an increase in the strength of electric current (b) Decreases, as the distance from the wire increases

• Both a, b

• Only a

• Only b

• None

A common household device, that do not use an electromagnet in its working, is-

• The electric bell

• Geyser

• Telephone

• Loud speaker