Electric current and its effects

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

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

• The electric bell

• Geyser

• Telephone

• Loud speaker

The filament of A bulb, is a wire of

• High resistivity, low melting point

• Low resistivity, low melting point

• High resistivity, high melting point

• Low resistivity, high melting point

Which one of the following is the most energy efficient

• LED

• Incandescent bulb

• CFL

The heating effect of an electric current is used in

• Hair dryer

• A fan

• A computer

Which is true about a cell?

• Longer line represent-Positive terminal and Shorter line represents-Negative Terminal

• Longer line represent-Negative terminal and Shorter line represents-Positive Terminal

• Both line represent-Positive Terminal

• Both line represents-Negative Terminal

Magnetic field inside a long solenoid carrying current is

• same at all points (uniform)

• different at poles and at the centre

• zero

• different at all points

What are electrons in electric circuit

• charge carriers

• flowing particles which form electric current

• misconception

• electric current pushers