Current between two points will not be flowing if :

How can a continuous flow of current be obtained? What are the sources of energy and name of the devices required for continuous flow of current?

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

How much work is done in moving a charge of $2 \mathrm{C}$ across two points having a potential difference $10 \mathrm{V}$?

What is a conductor of electricity? Give two examples.

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

Fill in the blank spaces by choosing correct words from the list given below :

List: open circuit, insulator, terminal, circuit, chemicals

A circuit in which electricity does not flow is called an _____.