What work does the current in the electric motor of the desktop fan do in 30 seconds
| May 20, 2021 | education
What work does the current in the electric motor of the desktop fan do in 30 seconds, if at 220 V, the current in the motor is 100mA?
t = 30 s.
U = 220 V.
I = 100 mA = 0.1 A.
A -?
When an electric current passes through a conductor, it performs work A, the value of which is determined by the Joule-Lenz law: A = I * U * t. Where I is the current in the conductor, U is the voltage at the ends of the conductor, t is the time the current passes through the conductor.
A = 0.1 A * 220 V * 30 s = 660 J.
Answer: the electric current in the conductor does the work A = 660 J.
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