What are conductors and insulators? Give three examples of each.
Important Questions on Electricity and Circuits
The S.I. unit of electric current is _____.
Two lamps, one rated at , and the other at , are connected in parallel to the electric mains supply. What current is drawn from the line if the supply voltage is ?
Define electric current and give its SI unit.
Calculate the effective resistance across AB.
The diagram above shows a circuit with the key k open. Calculate the resistance of the circuit when the key k is open and calculate the current drawn from the cell when the key k is open.
The electric charge is passing through an electric bulb in one hour. How much current will pass through an electric bulb ?
Name and define unit for electric current.
Which device is used to check the presence of electric current?
What is a conductor of electricity? Give two examples.
