Physics And Measurement Question 319

Question: Joule-second is the unit of

[CPMT 1990; CBSE PMT 1993; BVP 2003]

Options:

A) Work

B) Momentum

C) Pressure

D) Angular momentum

Show Answer

Answer:

Correct Answer: D

Solution:

$ \tau =\frac{dL}{dt} $
therefore $ dL=\tau \times dt $

$ =r\times F\times dt $ i.e. the unit of angular momentum is joule-second.



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