What is an electric bulb? Draw and explain the different parts of an electric bulb.

What is a conductor of electricity? Give two examples.

The diagram below shows a dual control switch circuit connected to a bulb. Copy the diagram and complete it so that the bulb is switched ON.

Correct the statements by modifying the underlined words appropriately if it is wrong.

Heating coils are made up of materials having high resistivity and low melting point.

Write the conventional symbol of the following component used in electric circuit diagram-

Electric bulb

When $2 \mathrm{A}$ current is passing through a conductor in $10$ seconds, $80 \mathrm{J}$ heat is produced then find the resistance of conductor.

DOWN:

$1$. An inert gas filled in the bulbs.

$2$. A metal which is a good conductor of electricity

$3.$ This part acts as the positive terminal of a dry cell

$5.$ The source of energy in a torch

ACROSS:

$3.$ A light-giving device made of wax.

$4.$ A light-emitting part of a torch

$6.$ A metal used to make filament of an electric bulb

$7.$ An insulator also used as a fuel and for making furniture.

Draw a labelled diagram of an electric bulb. Name the gases filled in the bulb.