Listen NCERT Audio Books - Kitabein Ab Bolengi
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.
Why does the cord of an electric heater not glow while the heating element does?
Compute the heat generated while transferring 96000 coulombs of charge in one hour through a potential difference of 50 V.
What determines the rate at which energy is delivered by a current?
An electric motor takes 5A from a 220 V line. Determine the power of the motor and the energy consumed in 2 h.