Question

Assertion (A): The dimensional formula of a physical quantity is same in any system of units. Reason (R) : Dimensional formula is independent of system of units. (1) Both A and R are true and R is the correct explanation of A (2) Both A and R are true and R is not the correct explanation of A (3) A is true but R is false (4) A is false but R is true​

Answer 1

Assertion :

(A) The dimensional formula of a physical quantity is the same in any system of units.

Reason (R): Dimensional formula is independent of the system of units.

Explanation:

A:

• All physical quantities can be expressed in terms of seven basic quantities like mass, length, time, temperature, electric current, luminous intensity, and quantity of substance.
• The dimensions of a physical quantity and the dimensions of its unit are similar.

B:

• The dimensions of a physical quantity are independent of the system of units used to measure the quantity.

Hense both A and R are true & R is the correct explanation of A.

Correct option is A