Question

Choose the vector physical quantity

• A. Electric flux
• B. Electric potential
• C. Electric potential energy
• D. Electric intensity

Hint:

Electric field or electric intensity is a vector quantity. Electric potential, potential energy, and electric flux are scalar quantities.

Answer 1

The Correct Option is D

Concept:
Physical quantities are mainly of two types: \[ \text{Scalar quantities} \] and \[ \text{Vector quantities} \] A scalar quantity has only magnitude. A vector quantity has both magnitude and direction.

Step 1: Understand electric intensity.
Electric intensity is another name for electric field. Electric field at a point is defined as force per unit positive charge: \[ E=\frac{F}{q} \] Force is a vector quantity. Since charge is scalar, electric field also has direction. Therefore: \[ \text{Electric intensity is a vector quantity} \]

Step 2: Check other options.
Electric flux is a scalar quantity because it is the dot product of electric field and area vector: \[ \Phi = \vec{E}\cdot \vec{A} \] Electric potential is scalar: \[ V=\frac{W}{q} \] Electric potential energy is also scalar.

Step 3: Choose the vector quantity.
Among the given options, only electric intensity has both magnitude and direction. Hence, the correct answer is: \[ \boxed{(D)\ \text{Electric intensity}} \]