What kind of work does the current in a car light bulb produce at a voltage of 12 V and a current of 3.5 A for 2 minutes?
| May 7, 2021 | education
U = 12V.
I = 3.5 A.
t = 2 min = 120 s.
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 = U * I * t, where U is the voltage at the ends of the conductor, I is the current in the conductor, t is the time of current passage.
A = 12 V * 3.5 A * 120 s = 5040 J.
Answer: when passing through a conductor, the current performs work A = 5040 J.
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