Q3 of 41 Page 218

An electric iron of resistance20 takes a current of 5 A. Calculate the heat developed in 30 s.

Here, Current, I = 5 A

Resistance, R = 20


Time, t = 30 s


Now, we know, Heat produced is given as,



Thus, the heat developed is 15000 joules.


More from this chapter

All 41 →
1

Why does the cord of an electric heater not glow while the heating element does?

 2

Compute the heat generated while transferring 96000 coulombs of charge in one hour through a potential difference of 50 V.

 1

What determines the rate at which energy is delivered by a current?

 2

An electric motor takes 5A from a 220 V line. Determine the power of the motor and the energy consumed in 2 h.