SATHEE: Physical World Units and Measurements

Physical World Units and Measurements - Result Question 20

21. The dimensions of Planck’s constant are same as

(a) energy

[2001]

(b) power

(d) angular momentum

Show Answer

Answer:

Correct Answer: 21. (d)

Solution:

(d) We know that $E = h v$

$h = \frac{E}{v} = \frac{[M L^{2} T^{- 2}]}{[T^{- 1}]} = [M L^{2} T^{- 1}]$

Angular momentum $= I ω$

$= [M L^{2}] [T^{- 1}] = [M L^{2} T^{- 1}]$

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Physical World Units and Measurements - Result Question 20

21. The dimensions of Planck’s constant are same as

Answer:

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