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(B) According to Faraday's law of induction,the induced emf is given by $e = -\frac{d\phi}{dt}$. This means the induced emf is proportional to the slo

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The magnitude of the induced emf is maximum between $B$ and $C$.

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(B) According to Faraday's law of induction,the induced emf is given by $e = -\frac{d\phi}{dt}$. This means the induced emf is proportional to the slope of the $\phi-t$ graph.$1$. Between $A$ and $B$,the slope is constant and positive,so the induced emf is constant and negative.$2$. At point $B$,the flux changes abruptly from a positive value to zero. The slope $\frac{d\phi}{dt}$ is negative and very large (approaching infinity),so the induced emf is a large positive value.$3$. Between $B$ and $C$,the slope is constant and negative,so the induced emf is constant and positive.$4$. Between $C$ and $E$,the slope of the curve changes continuously,meaning the magnitude and direction of the induced emf change.Evaluating the options:- $(A)$ Between $B$ and $D$,the slope changes from a constant negative value to a varying value,so the magnitude and direction of emf change. This is correct.- $(B)$ Between $B$ and $C$,the slope is constant,so the emf is constant,not maximum. This statement is incorrect.- $(C)$ Between $A$ and $C$,the slope is constant,so the emf is constant. This statement is also incorrect as per the question's context,but $(B)$ is the most clearly false statement regarding the magnitude.Wait,re-evaluating: The question asks for the statement that is $NOT$ correct. - Option $(B)$ states emf is maximum between $B$ and $C$. Since the slope is constant,emf is constant. Thus,$(B)$ is incorrect.- Option $(D)$ states emf is zero at $B$. At $B$,the derivative is undefined due to the sharp corner,but it is certainly not zero. Therefore,$(D)$ is also incorrect. Given the standard interpretation of such problems,$(B)$ is the intended incorrect statement as the emf is constant,not maximum.

The graph shows the variation in magnetic flux $\phi(t)$ with time through a coil. Which of the statements given below is not correct?

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