Page 7 - CHAPTER-1 (Electricity)

CHAPTER 1

ELECTRICITY

• When a charge of 1 coulomb flows through any cross-section of a

conductor in 1 second, then the electric current flowing through it

is said to be 1 ampere.

i.e. 1ampere= 1 Coulomb ⇒1A= 1C
1 second 1s

• Smaller units of current are milliampere.

• (1mA= 10 A) and microampere (1 = 10 ).
−3
−6

(iii)The Direction of Electric Current:

• The direction of the electric current is

opposite to the direction of the flow of

electrons (negative charges).

• In an electric circuit the current flows

from the positive terminal of the cell to
Fig 3:
the negative terminal.

Did you know?

Electricity travels as fast as the speed of light, around 300,000

kilometres per second.

Science Vocab:

1. Current 2. Ampere 3. Cell

5