Question

1.
Define electric current & write its S.I unit.


2.
How many electrons are there in one coulomb of charge?
3.
Draw symbol for (a) cell (b) switch.​

Answer 1

1.The SI unit of electric current is the ampere, which is the flow of electric charge across a surface at the rate of one coulomb per second. Electric current is measured using a device called an ammeter.

2.A single electron has a charge of 1.60217733 × 10-19 Coulombs. A collection of 6.2415 × 1018 electrons has a charge of one Coulomb (1/1.60217733x10-19). 1.6 into 10 raise to power -19 no of electrons are present in one coulomb of charge.

3.in the figure

Answer 2

Answer:

1)Electric current is the rate of flow of electrons across a circuit.

2)see the first picture.

3) see the second picture..