Silicon is $......$

Mention the condition under which charges can move in a conductor. Name the device which is used to maintain this condition in an electric circuit.

Which has a greater resistance$-$a $100$ $W$ bulb or a $60$ $W$ bulb?

If resistors are connected in series,the current through each resistor remains the same.

In a household electric circuit,different appliances are connected in parallel to one another. Give two reasons for this. An electrician puts a fuse of rating $5 \, A$ in that part of a domestic electrical circuit in which an electrical heater of rating $1.5 \, kW, 220 \, V$ is operating. What is likely to happen in this case and why? What change,if any,needs to be made?

In an electric circuit,state the relationship between the direction of conventional current and the direction of flow of electrons.