Question

Question #2c35a

Answer 1

20.66 watts

Explanation:

Given load is lamp load. We know that lamp load is resistive in nature.
Since it is resistive in nature,hence it is our first duty to find out how much resistance it has.

power=voltage`xx`current

`P=VI`

`P=VxxV/R` [since V=IR]

`P=V^2/R`

`=>R=V^2/P` `" " color(blue)((1))`

Given bulb ratings are 100W&220volts.

If we substitute the ratings in`" " color(blue)((1))`,
then we get resistance value.

`R=220^2/100`

`R=484 ohms`

Power consumed if 100v applied to 484ohm:

As given in the question , apply 100volts to 484ohm resistor .

`P_2=V_2^2/R`

`P_2=100^2/484`

`P_2=20.66`watts