The $V -I$ graphs for the two wires $A$ and $B$ are shown in the figure. If we connect both the wires one by one to the $v$ same battery which of the two will produce more heat per unit time ? Give justification for your answer.
$H = I ^{2} R t$
The slope of wire $A$ is more than wire $B$. Resistance of wire A will be more than $B$. And $H$ is directly proportional to $R$, more heat will be produced in wire $A.$
Why is heat produced when a current is passed through a conductor ?
An electric heater consumes $1.1 \,kW$ power when $220\, V$ voltage is applied to it. How much current will be flowing through it?
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 will happen to the current flowing through a conductor, if the potential difference is doubled ?
Give an example of a metal which is the best conductor of heat.