Question

The SI unit of electric field intensity is-
1. C
2. C.m
3. V
4. V/m

Answer 1

Correct Answer - Option 4 : V/m

CONCEPT:

• Electric field (E): The region around an electric charge in which other charge particles experience an attractive or repulsive force is called an electric field.

The electric field due to a charged particle is given by:

E = KQ/r² .........(i)

Where K is constant, Q is charge and r is the distance from the charge

•  Electric potential: The amount of work done in moving a unit charge from a reference point to a specific point in the electric field without producing any acceleration is called electric potential.

The electric potential due to a charged particle is given by:

V = KQ/r    ..........(ii)

Where K is constant, Q is charge and r is the distance from the charge

• Volt (V) is the SI unit of the Electric Potential.

The relation between an electric field and an electric potential is given by:

E = V/r  (Divide equation (i) by equation (ii), we can get this relation)

EXPLANATION:

Since E = V/r

The SI unit of E = SI unit of V/ SI unit of r = Volt/meter = V/m

Hence the SI unit of the electric field (E) = V/m