Question

Express the power of a 100 watt bulb in CGS unit.

Answer 1

The unit of Power in CGS system is erg. 1 erg equals to 1 dyne force moved through 1 cm in 1 second.

In MKS system unit of Power is watt..
1 watt equals one newton of force moved through 1 m in 1 second.

1 watt = 1 joule/ sec

1 erg = 10-^7 joules

1 watt = 10^7 erg/s

100 watt = 100 ×10^7 =10^9
_____________________________

100 watt= 10^9 erg/s
_____________________________

Hope this will help you....

Answer 2

${\huge{\underline{\underline {ANSWER: }}}}$

In MKS System, unit of Power is $\bf{watt}$

i.e., 1 Watt = 1 Newton force applied to move through 1m in 1s.

In CGS System, unit of Power is $\bf{erg}$

i.e., 1 erg = 1 Dyna force applied to move through 1cm in 1s.

1 watt = 1 J/s

1 erg = ${10^7}$ J/s

So,

1 Watt = ${10^7}$ erg/s

$\boxed{Hence, 100 watt = 100 × {10^7} = {10^9} erg/s}$

$\sf{\underline{\underline {Some\: Additional\: Information}}}$

Power = $\dfrac{Work\: done} {Time\: taken}$ or $\dfrac{Energy\: Supplied} {Time\: taken}$

Dimensional formula of Power is [ML²T¯³]