In the following circuits (Figure), heat produced in the resistor or combination of resistors connected to a $12\, V$ battery will be
minimum in case $(i)$
same in all the cases
maximum in case $(ii)$
maximum in case $(iii)$
The resistivity does not change if
How can we maintain a potential difference across a conductor ?
Why is very less heat generated in long electric cables than in filaments of electric bulbs ?
What is the $SI$ unit of electric potential ?
State the factors on which the resistance of a cylindrical conductor depends, How will resistance of a conductor change if it is stretched so that its length is doubled ?