I = 0.3 Ampere – current in the electrical circuit;
R = 80 Ohm – conductor resistance;
t = 10 seconds – time span.
It is required to determine Q (Joule) – how much heat will be released in the conductor over a period of time t.
Let’s find the voltage at the ends of the conductor (according to Ohm’s law):
U = I * R = 0.3 * 80 = 24 Volts.
Then the power of the electric current is equal to:
W = U * I = 24 * 0.3 = 7.2 watts.
The work of the current strength for a period of time t will be equal to:
A = W * t = 7.2 * 10 = 72 Joules.
This work will be numerically equal to the amount of heat released, that is:
Q = A = 72 Joules.
Answer: 72 Joules of heat will be released through the conductor in 10 seconds.
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