First slide

Physical quantities and units

Question

What is the power of a 100 W bulb in CGS units?

Easy

A

$10^{6} e r g s^{- 1}$
B

$10^{7} e r g s^{- 1}$
C

$10^{9} e r g s^{- 1}$
D

$10^{11} e r g s^{- 1}$

Solution

As, $100 W = 100 J s^{- 1} = 10^{9} e r g s^{- 1}$

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