A) \[-\frac{{{\phi }_{2}}-{{\phi }_{1}}}{5\,Rnt}\]
B) \[-\frac{n({{\phi }_{2}}-{{\phi }_{1}})}{5\,Rt}\]
C) \[-\frac{({{\phi }_{2}}-{{\phi }_{1}})}{\,Rnt}\]
D) \[-\frac{n({{\phi }_{2}}-{{\phi }_{1}})}{\,Rt}\]
Correct Answer: B
Solution :
[b] The change in flux \[=n({{\phi }_{2}}-{{\phi }_{1}})\] Total resistance of the circuit\[=4R+R=5R\] Thus induced current, \[i=\frac{\Delta \phi /\Delta t}{R}=\frac{n({{\phi }_{2}}-{{\phi }_{1}})}{5RT}\]
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