One Coulomb charge is equal to the charge of about ______ electrons.

Question

Question

This question was previously asked in

RRB ALP Electrician 22 Jan 2019 Official Paper (Shift 3)

Answer 1

The correct answer is 6 × 1018.

Key Points

Electric charge is a fundamental property of matter that causes the matter to experience a force when kept in electric and magnetic fields.
- There are two types of charges possessed by matter - negative charge and positive charge.
- The matter that is neither positive nor negative is said to be neutral.
- The electric charge of the matter comes from the charge carried by electrons and protons at the atomic level.
- The SI unit of electric charge is coulomb (C).

EXPLANATION:

\(I = \frac{q}{t}\)

Where I is current, q is the charge and t is the time.

So, 1 coulomb is the charge from a current of 1 A flowing in 1 s.

Number of electrons in 1 C = \(\frac{1 \:C}{1.6\; \times \;10^{-19}\: C} = 6.24\; \times \;10^{18}\)

So 1C (Approx) = 6 × 1018