A coil has inductance $H$. The ratio of its reactance when it is connected first to an a.c. source and then…

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
  1. $\infty$
  2. zero
  3. one
  4. two

Solution

In d.c. source reactance will be zero. $\therefore \quad \frac{Z_{\mathrm{ac}}}{Z_{\mathrm{dc}}}=\infty$

Asked in: MHT CET 2024 (15 May Shift 2)

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