A two terminal black box contains one of the R-L-C elements.
The black box is connected to a 220 V ac supply.
The current through the source is I.
When a capacitance of 0.1 F is inserted in series between the source and the box, the current through the source is 2 I.
The element is
A. a resistance.
B. an inductance.
C. a capacitance.
D. it is not possible to determine the element.
Show Answer
Answer: B
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