Question

Which is the only vector quantity out of the following?

• A. Charge of a gold leaf electroscope
• B. Electrostatic potential
• C. Current flowing in a metal
• D. Angular momentum of a spinning body

Answer 1

The correct option is D Angular momentum of a spinning body

(i.) Charge of a body is a scalar quantity.

(ii.)Similarly, Electrostatic potential is also a scalar quantity, since it doesn't possess a direction.

(iii.)Even though current possesses certain direction, but when it comes to addition, it follows scalar addition.

(iv.)Whereas Angular momentum of a body ($\overrightarrow{L}$) has magnitude as well as direction both. Hence it is a vector quantity.