From the condition, we know that the conductor is energized at 30 V, and we also know that at the same time a charge of 75 C passed through it.
Brief wash down the conditions of the problem:
U = 30 V (voltage under which the conductor is located);
q = 75 C (the amount of electricity that passed through the conductor).
To calculate the work of the current, apply the formula:
A = q * U (product of the amount of electricity and voltage)
All the data is there, substitute and calculate:
A = 75 Cl * 30 B = 2 250 J.
Answer: 2,250 Joules – work.
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