Two bulbs of $40\,W$ each are connected in parallel. The total power consumed by this combination is ............. $W$.

If current in an electric bulb changes by $1\%$,then the power will change by ............ $\%$

Two heaters take $10$ minutes and $20$ minutes respectively to heat the same amount of water. If the heaters are connected in parallel,what would be the time required to heat the same amount of water?

An electric heater heats a certain amount of water in $5 \, \text{min}$ when connected to a $220 \, \text{V}$ supply. How many minutes will it take to heat the same amount of water when connected to a $110 \, \text{V}$ supply?

For driving a current of $2\, A$ for $6$ minutes in a circuit, $1000\, J$ of work is to be done. The $e.m.f.$ of the source in the circuit is ................ $V$.

Assertion: Long distance power transmission is done at high voltage.
Reason: At high voltage supply,power losses are less.