A metal has a very large number of free electrons and a non$-$metal very less number of free electrons.
In an electrical circuit three incandescent bulbs $A, B$ and $C$ of rating $40\, W, 60\, W$ and $100 \,W $ respectively are connected in parallel to an electric source. Which of the following is likely to happen regarding their brightness?
What makes the electric current to flow through an electrolyte?
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.
The electric current flowing through any conductor is directly proportional to the electric potential difference across the conductor. Which law is this?