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Question 22

In the circuit shown here, the voltage across E and C are respectively 300 V and 400 V. The voltage E of the ac source is :

Solution

The resultant source voltage $$E$$ is the magnitude of the phasor difference between $$V_L$$ and $$V_C$$: $$E = |V_L - V_C|$$

$$E = |300 - 400|$$

$$E = 100\text{ V}$$

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