Question:
In a part of a circuit shown: Find VA – VB in volts. It is given that current is decreasing at a rate of 1 ampere/s.
In a part of a circuit shown: Find VA – VB in volts. It is given that current is decreasing at a rate of 1 ampere/s.
Updated On: Jan 18, 2025
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Correct Answer: 18
Solution and Explanation
The voltage equation across the circuit is given by:
\[ V_A - iR - L \frac{di}{dt} - 12 = V_B \]
Rewriting, we get:
\[ V_A - V_B = iR + L \frac{di}{dt} + 12 \]
Given that the potential difference between points A and B is:
\[ V_A - V_B = +18 \, \text{volts} \]
Final Answer:
\(V_A - V_B = +18 \, \text{volts}\)
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