Two bulbs $A$ and $B$ are rated as $90\, W -120 \,V$ and $60\, W -120\, V$ respectively. They are connected in parallel across a $120\, V$ source. Find the current in each bulb. Which bulb will consume more energy ?
The units of resistance are ampere.
$V -I$ graphs for two wires $A$ and $B$ are shown in the figure. If both the wires are made of the same material and are of equal thickness, which of the two is of more length ? Give justification for your answer.
An electric refrigerator rated $400\, W$ operates $8$ hour per day. What is the cost of the energy to operate it for $30$ days at ₹ $3.00$ per $k W h ?$
What is meant by equivalent resistance ?