Question

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

Answer 1

In SI unit, watt = joule/s
In CGS unit, 1 joule = 10⁷ erg
So, 100 watt = 100 joule/s
\[= \frac{100 \times {10}^7 \text{erg}}{1 s} = {10}^9 \text{erg}/s\]