How long did a 10A current flow through the conductor if, at a voltage
| July 13, 2021 | education
How long did a 10A current flow through the conductor if, at a voltage at the ends of the conductor of 220V, an amount of heat equal to 132kJ was released in it?
To find the duration of the passage of current through the conductor used, we use the Joule-Lenz law: Q = U * I * t, whence we express: t = Q / (U * I).
Values of variables: Q – released heat (Q = 132 kJ = 132 * 10 ^ 3 J); U is the voltage at the ends of the conductor (U = 220 V); I – current strength (I = 10 A).
Calculation: t = Q / (U * I) = 132 * 10 ^ 3 / (220 * 10) = 60 s or 1 min.
Answer: The current flowed through the used conductor for 60 s.
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