If the work done to take $3 \,C$ electric charge from one point to another point is $15 \,J$,what will be the potential difference between these two points (in $,V$)?

Which of the following statements is $NOT$ true for a series combination of two resistors?

$A$ potential difference $V$ is applied across a conductor of length $L$ and diameter $D$. How is the resistance $R$ of the conductor affected,when in turn $(i)$ $V$ is halved,$(ii)$ $L$ is halved,and $(iii)$ $D$ is doubled? Justify your answer in each case.

Positive charges flow from high potential to low potential.

Why is tungsten metal selected for making filaments of incandescent lamps?

What is the practical unit used for electrical energy?