Question

An electric iron of resistance 20 ohm takes current of 5A .Calculate heat developed in 30 sec?

Answer 1

hi,good afternoon
r=20 ohm
i=5 A
t=30s
Heat produced is equal to- i square× r× t joules, and if u want to convert it to calories then multiply it by 0.24 because 1 J = 0.24 cal

H=i^2rt
=5×5×20×30 J
=15000 J
or 15000×0.24 cal

i hope it helped u .
pls mark it brainliest : )

Answer 2

Given :-

R = 20 Ω

I = 5 A

t = 30 s

H = I^2Rt

= (5)^2×20×30

= 15000 J

= 1.5 × 10^4 J