Calculate the resistance of a bulb rated $40 \mathrm{W},230 \mathrm{V}$ when in ON condition.

A heater draws $1100 \mathrm{W}$ at $220 \mathrm{V}$.

Find the resistance of heater when in ON condition.

A heater draws $1100 \mathrm{W}$ at $220 \mathrm{V}$.

Calculate the kilowatt hours consumed in a week if the heater is used daily for four hours at the rated voltage.

A bulb used in a car is rated $12 \mathrm{V}, 48 \mathrm{W}$. Find the energy consumed in one minute when the bulb is connected to

(a) a $12-\mathrm{V}$ battery

A bulb used in a car is rated $12 \mathrm{V}, 48 \mathrm{W}$. Find the energy consumed in one minute when the bulb is connected to

(b) a $6-V$ battery.