Question

An electric bulb marked 100 w 230 v if the supply voltage drop to 115 what is the heat and light energy produced by the bulb in 2 min

Answer 1

Answer:

p=100w ,pd=230v,t=2min=2*60=120

p=vi

100=230i

I=10/23

now

h=vit

h=230*120*10/23=1200

therefore heat=1200joules

Explanation:

i hope this is your correct answer

thanks u