Doubling the operating frequency of a purely capacitive circuit: A. has no effect on the total circuit current B. doubles the amount of total current C. cuts the total current by one-half D. thrice the amount of total current E. None of the above

The correct answer is: B. doubles the amount of total current.

A purely capacitive circuit is a circuit that contains only capacitance and no resistance or inductance. The current through a capacitor is proportional to the rate of change of the voltage across it. This means that if the operating frequency of a purely capacitive circuit is doubled, the current through the capacitor will also double.

Option A is incorrect because doubling the operating frequency will cause the current through the capacitor to double.

Option C is incorrect because doubling the operating frequency will cause the current through the capacitor to double, not cut it in half.

Option D is incorrect because

Option E is incorrect because doubling the operating frequency will cause the current through the capacitor to double.