The combination of two or more cells is called a  .

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

A wire joint

In the given circuit diagram, identify the objects marked as $1, 2, 3$.

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

An electric cell

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

Electric bulb

$15$ cells each of emf $2$ volt are connected in series but $2$ of them are connected wrongly. Calculate the emf of the combination.

Name the electrical component that is described by the symbol:

Zubeda made an electric circuit using a cell holder shown in the figure, a switch and a bulb. When she put the switch in the ‘ON’ position, the bulb did not glow. Help Zubeda in identifying the possible defects in the circuit.

Match the following.