Power = 100 W

Power is defined as the rate of dissipation of energy. Energy is expressed in Joules.

1 W = 1 Js^-1

1 Joule is defined as the amount of energy exerted when a force of 1 N displaces an object by 1m.

1 J = 1 Nm

1 Newton of force can be converted into CGS units. The CGS equivalent is – 1 N = 10⁵ dyne

1 meter is equal to 100 cm.

1 m = 100 cm

1 J = 1 Nm

= 10⁵ dyne × 100 cm

= 10⁷ dyne cm

1 W = 10⁷ dyne cm/s

100 W = 100 × 10⁷ dyne cm/s

= 10⁹ dyne cm/s

1 dyne cm = 1 erg

1 erg = 10^-7 J

So 100 W = 10⁹ erg/s