The amount of heat produced in a resistor when a current is passed through it can be found using

Which of the following graphs represent the variation of power loss in the external load with external resistance $R$?

An electrical bulb rated $220\,V , 100\,W$, is connected in series with another bulb rated $220\,V$, $60\,W$.If the voltage across combination is $220\,V$, the power consumed by the $100\,W$ bulb will be about $........... W$

Assertion : When current through a bulb decreases by $0.5\%$, the glow of bulb decreases by $1\%$.

Reason : Glow (Power) which is directly proportional to square of current.

In India electricity is supplied for domestic use at $220 \,V$. It is supplied at $110 \,V$ in USA. If the resistance of a $60 \,W$ bulb for use in India is $R$, the resistance of a $60 \,W$ bulb for use in USA will be

Two electric bulbs whose resistance are in the ratio of $1: 2$, are connected in parallel to a constant voltage source. The power dissipated in them has the ratio