1.

When 100 volt dc is applied across a coil, a current of 1 amp flows through it. When 100 volt ac at 50 cycle\[{{s}^{-1}}\] is applied to the same coil, only 0.5 ampere current flows. The impedance of the coil is                                  [Bihar MEE 1995]

A. \[100\,\Omega \]
B. \[200\,\Omega \]
C. \[300\,\Omega \]
D. \[400\,\Omega \]
Answer» C. \[300\,\Omega \]


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