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8090 [49]
4 years ago
12

I don't get the flat line on a graph. on a distance/speed or motion graph, they say it is not moving. that is what I don't get i

s it staying in one place or moving at the same pace.
Physics
1 answer:
timofeeve [1]4 years ago
4 0
A flat line means the the speed is the same . Its moving at the same pace.
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A rectangular loop of area A is placed in a region where the magnetic field is perpendicular to the plane of the loop. The magni
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Answer:

Induced emf, \epsilon=-A\dfrac{B_{max}e^{-t/\tau}}{\tau}

Explanation:

The varying magnetic field with time t is given by according to equation as :

B=B_{max}e^{-t/\tau}

Where

B_{max}\ and\ t are constant

Let \epsilon is the emf induced in the loop as a function of time. We know that the rate of change of magnetic flux is equal to the induced emf as:

\epsilon=-\dfrac{d\phi}{dt}

\epsilon=-\dfrac{d(BA)}{dt}

\epsilon=-A\dfrac{d(B)}{dt}

\epsilon=-A\dfrac{d(B_{max}e^{-t/\tau})}{dt}

\epsilon=A\dfrac{B_{max}e^{-t/\tau}}{\tau}

So, the induced emf in the loop as a function of time is A\dfrac{B_{max}e^{-t/\tau}}{\tau}. Hence, this is the required solution.

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