With a current in the electrical circuit of 0.3 A, the voltage on the voltmeter
| September 21, 2021 | education
With a current in the electrical circuit of 0.3 A, the voltage on the voltmeter connected to the rheostat shows 120 V. Find the power of the rheostat.
To calculate the power of the used rheostat, we apply the formula: P = U * I.
Values of variables: I – current in the circuit (I = 0.3 A); U – voltage according to voltmeter readings (U = 120 V).
Let’s make a calculation: P = U * I = 120 * 0.3 = 36 W.
Answer: The power of the used rheostat is 36 W.
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