Establish the relation between electric field and electric potential at a point. Draw the equipotential surface for an electric field pointing in +Z direction with its magnitude increasing at constant rate along -Z direction

Explanation

To establish the relation between electric field (E) and electric potential (V) at a point, we can follow these steps:

### Step 1: Understanding Electric Field and Electric Potential
Electric field (E) is defined as the force per unit charge experienced by a positive test charge placed in the field. Electric potential (V), on the other hand, is the work done per unit charge in bringing a test charge from infinity to a point in the field.

### Step 2: Mathematical Relation
The relation between electric field and electric potential can be expressed mathematically. The electric field is related to the electric potential by the equation:
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