NEET · Physics · STD 12 -7. Alternating current
Figure shows a circuit that contains three identical resistors with resistance \(R = 9.0 \,\,\Omega\) each, two identical inductors with inductance \(L = 2.0\, mH\) each, and an ideal battery with \(emf\,\, = 18 \,\,V.\) The current \(i\) through the battery just after the switch closed is
- A \(0.2\;A\)
- B \(4.0\;A\)
- C \(0\;A\)
- D \(2\;mA\)
Answer & Solution
Correct Answer
(B) \(4.0\;A\)
Step-by-step Solution
Detailed explanation
At time, \(t=0\) i.e., when switch is closed, inductor in the circuit provides very high resistance (open circuit) while capacitor starts charging with maximum current (low resistance). Equivalent circuit of the given circuit
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