In the circuit diagram below, 10 units of electric charge move past point x every second What is the current in the circuit _______

In the circuit shown, which switches (L, M or N) must be closed to light up the bulb?

 

Small amounts of electrical current are measured in milliampere (mA). How many milliampere are there in 0.25 A ?

In which of the following circuits are the bulb connected in series?

One unit of coulomb is charge of approximately ------------ protons or electrons.

--------- is used to measure the electric current.

S.I. unit of Electrical conductivity of a conductor is -----------

Electron flow is in the same direction to conventional current flow.

The fuse wire does not melts whenever there is overload in the wiring.

In a parallel circuit, the electric components are divided into branches.

The representation of the electric current is A.

Name the device used to generate electricity.

Define fuse.

Name some devices that run using heat effect of electric current.

Define an electric current.

Differentiate parallel and serial circuits.

Define electrical conductivity.

Explain the construction and working of an Telephone.

Explain the heating effect of electric current.

Explain the construction and working of a dry cell.

A student made a circuit by using an electric cell, a switch, a torch bulb (fitted in the bulb holder) and copper connecting wires. When he turned on the switch, the torch bulb did not glow at all. The student checked the circuit and found that all the wire connections were tight.
What could be the possible reason for the torch bulb not glowing even when the circuit appears to be complete?