textbook exercises

Define electric field.

Name any two applications which work under the principle of heating effect of current.

How are the home appliances connected in general, in series or parallel? Give reasons.

List the safety features while handling electricity.

Rubbing a comb on hair makes the comb get $-0.4 \mathrm{C}.$ Find which material has lost electron and which one gained it.

Rubbing a comb on hair makes the comb get $-0.4 \mathrm{C}$. Find how many electrons are transferred in this process.

Calculate the amount of charge (in coulombs) that would flow in $2$ hours through an element of an electric bulb drawing a current of $2.5 \mathrm{A}$.

The value of current $\left(I\right)$ flowing through a resistor for various potential differences $\left(V\right)$ across the resistor are given below. What is the value of resistor?