Question

pls solve this numerical​

Answer 1

here=V=220(V)

and W=100(P)

first,to calculate R

so,

P=V^2/R

100=220*220/R

R=220*220/100

R=48400/100

R=484ohm

now,

V=110

R=484ohm

P=?

P=V^2/R

P=110*110/484

P=12100/484

P=25 watt is the answer