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A series circuit has R = 6 ohm, XL = 8 ohm and negligible capacitive reactance. If supplied by 100 V RMS, the current magnitude is?

A5 A
B10 A
C12.5 A
D16.67 A

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Correct Answer: B. 10 A

Explanation: |Z| = sqrt(6^2+8^2) = 10 ohm, so I = 100/10 = 10 A.

Reference: Standard network theory: ac circuit analysis

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