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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