Question

How to Find dimensional unit of Coulomb's Law constant (k)

(Class 12 Electrostatics)​

Answer 1

Answer:

here is your answers

Explanation:

The dimensional formula of Coulomb is given by,

[M0 L0 T1 I1]

Where,

M = Mass

I = Current

L = Length

T = Time

Derivation

Coulomb is the SI unit of electric charge. Therefore, the dimensional formula of Coulomb is the same as that of the electric charge.

Since, electric charge (Q) = current × time . . . . (1)

The dimensional formula of,

Current = [M0 L0 T0 I1] . . . . (2)

Time = [M0 L0 T1] . . . . (3)

On substituting equation (2) and (3) in equation (1) we get,

Since, electric charge (Coulomb) = current × time

Or, Coulomb = [M0 L0 T0 I1] × [M0 L0 T1] = [M0 L0 T1 I1]

Therefore, Coulomb is dimensionally represented as [M0 L0 T1 I1].

Answer 2

Answer:

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