NEET · Physics · STD 12 -7. Alternating current
An inductor of inductance \(2\,mH\) is connected to a \(220\,V , 50\,Hz\) \(a.c.\) source. Let the inductive reactance in the circuit is \(X _1\). If a \(220\,V\) dc source replaces the ac source in the circuit, then the inductive reactance in the circuit is \(X _2 . X _1\) and \(X _2\) respectively are
- A \(6.28\,\Omega\), zero
- B \(6.28\,\Omega\), infinity
- C \(0.628\,\Omega\), zero
- D \(0.628\,\Omega\), infinity
Answer & Solution
Correct Answer
(C) \(0.628\,\Omega\), zero
Step-by-step Solution
Detailed explanation
For \(AC\; X_L=\omega L \quad\) For \(DC, \;\omega=0\) \(X_1=100 \pi \times 2 \times 10^3\) \(\quad X_L=\omega L\)
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