Question

By what Percent will the illumination of the damp decrease if the current Drop by 20 percent

Answer 1

Answer:

36

Explanation:

E=P.T

E=VIT

E=I^2RT

E proportional to I^2

so

E1/E2=I1^2/(80^2 I2^2/100^2)

on solving E2=80^2E1/100^2

which comes 64/100

so its 36% less