Question

An electric iron of resistance 20 ohm takes a current of 5 A. Calculate the electric power

Answer 1

Explanation:

Given that Resistance(R) = 20 Ω, Electric current (I)= 5 A and time(t)= 30 s

Now we know that H= I2Rt

= 5×5×20×30

= 15000J=1.5×104J

∴ The heat developed in 30s is 1.5×104J

Answer 2

here is your answer..................