MHT CET · Physics · Electromagnetic Induction
A coil has inductance \(H\). The ratio of its reactance when it is connected first to an a.c. source and then to d.c. source is
- A \(\infty\)
- B zero
- C one
- D two
Answer & Solution
Correct Answer
(A) \(\infty\)
Step-by-step Solution
Detailed explanation
In d.c. source reactance will be zero.
\(\therefore \quad \frac{Z_{\mathrm{ac}}}{Z_{\mathrm{dc}}}=\infty\)
\(\therefore \quad \frac{Z_{\mathrm{ac}}}{Z_{\mathrm{dc}}}=\infty\)
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