﻿ Electric Field | Electric Charges and Fields - Zigya

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# Electric Charges and Fields

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## Electric Field

The electric field E at a point is defined as the electric force F experienced by a positive test charge q0 placed at that point divided by the magnitude of the test charge

The electric field E is a vector quantity and has the same direction as the electric force F. The electric field is due to an external charge and not due to the
test charge.

## Electric field due to a system of charges

Superposition principle will use determine electric field at a point P. According to the superposition principle, the total electric field at a point in space is equal to the vector sum of individual fields present.

The electric field at a point due to a system of charges is the vector sum of the electric fields at the point due to individual charges.

## Physical significance of electric field

1. The electric field is an elegant way of characterising the electrical environment of a system of charges.
2. The electric field is a characteristic of the system of charges and is independent of the test charge that you place at a point to determine the field.