Question

find out the heat developed in 3 minute by a device of resistance 920ohm working under 230volt?​

Answer 1

Answer:

H=I^2RT

R=920 OHM

T= 3 MIN

= 180S

I =V/R ( V=IR ohms law )

I=230/920

I=0.25 ampere

H=(0.25)^2×920×180

H = 10350 joules

Answer 2

Answer:

Explanation:

Because energy= heat =V²/R×t

H=52900/920×180

H=10350joule