Question

(1)Name the safety device used in an electric circuit. On what principle does it work?
(2)Define one unit of current
(3)One million electrons pass from point A to point B in a conductor in 10-4seconds.What is the magnitude and direction of current?
(4) The filament of an electric lamp draws a current of 0.4A which lights for 3 hours .Calculate the amount of charge that flows through the circuit

Answer 1

1) Fuse.It works on heating effect

Answer 2

4)4320 coloumb is the answer