Alternating Current Ques 6
6. A circuit when connected to an $AC$ source of $12$ $V$ gives a current of $0.2 $ $A$. The same circuit when connected to a DC source of $12$ $ V$, gives a current of $0.4$ $A. $The circuit is
[NEET Odisha 2019]
(a) Series $LC$
(b) Series $LR$
(c) Series $RC$
(d) Series $LC$
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Answer:
Correct Answer: 6.(b)
Solution:
- (b) $I_1=\frac{V}{Z}$
$ I_1=\frac{12}{\sqrt{R^{2}+(X_L-X_C)^{2}}}=0.2$ $ A $
In second case, the capacitor would provide infinite resistance but current is present in circuit, it means resistor and inductor can be present in the circuit.
Since current with $AC$ source and $DC$ source are different, inductor must be present with resistance.
BETA
