A) \[\infty ,0\]
B) \[0,\infty \]
C) \[\infty ,\infty \]
D) 0, 0
Correct Answer: B
Solution :
When coil is open, there is no current in it, hence no flux associated with it,\[ie\],\[\phi =0\]. Also, we know that flux linked with the coil is directly proportional to the current in the coil, \[ie\],\[\phi \propto i\] or \[\phi =Li\] where\[L\]is proportionality constant known as self-inductance. \[\therefore \] \[L=\frac{\phi }{i}=0\] Again since\[i=0\], hence,\[R=\infty \].
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