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JEE PYQ: Units And Dimensions Question 22

Question 22 - 2019 (11 Jan Shift 2)

If speed (V), acceleration (A) and force (F) are considered as fundamental units, the dimension of Young’s modulus will be:

(1) $V^{-2}A^2F^{-2}$

(2) $V^{-2}A^2F^2$

(3) $V^{-4}A^{-2}F$

(4) $V^{-4}A^2F$

Show Answer

Answer: (4)

Solution

Let $[Y] = [V]^a [F]^b [A]^c$. Comparing dimensions: $b = 1, a = -4, c = 2$. So $[Y] = [V^{-4}A^2F]$.


Learning Progress: Step 22 of 23 in this series