Question

An electric iron of resistance 20 ohm takes a current of 5A. Calculate the heat generated in 30s.

Answer 1

Dear student,

Given,


​​​​​​Resistance (R) = 20 Ω
Current (I) = 5 A
Time (t) = 30 s
Uisng the formula H= I²Rt = 5×5×20×30

= 15000J=1.5×10⁴J
The heat produce in 30s is 1.5×10⁴J

Regards