Which of the following represents voltage?
$\frac{\text { Work }}{\text { Current } \times \text { Time }}$
$\frac{\text { Work } \times \text { Time }}{\text { Current }}$
Work $\times$ Electric charge
Work $\times$ Electric charge $\times$ Time
A heater is joined in parallel with a $60\, W$ bulb is connected to the mains. If the $60\, W$ bulb is replaced by a $100\, W$ bulb, will the rate of heat produced by the heater be more, less or remain the same ?
Mention two special features of the material to be used as element of an electric iron.
The units of resistance are ampere.
What are the factors on which heat dissipated by a conductor depends ?
Give an example of a metal which is the best conductor of heat.