Question

Which one of the following physical quantities is not scalar?

• A. Magnetic Induction
• B. Length
• C. Acceleration
• D. Mass

Answer 1

Answer: (A), (C)

Magnetic Induction and Acceleration

Answer 2

A scalar quantity has only magnitude, while a vector quantity has both magnitude and direction.

• Magnetic Induction (Magnetic Field, $\vec{B}$): This is a vector quantity. It has both magnitude and direction.

• Length: This is a scalar quantity. It only has magnitude.

• Acceleration ($\vec{a}$): This is a vector quantity. It has both magnitude and direction (the direction of the change in velocity).

• Mass: This is a scalar quantity. It only has magnitude.

Therefore, both Magnetic Induction and Acceleration are vector quantities.