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Byju's Answer

Standard XII

Physics

Using Lenz's Law

Find the emf ...

Question

Find the emf induced as a function of time it is zero at $t = 0$ and is increasing in positive direction.

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Solution

The magnetic flux is given as

$ϕ = A \times B$

$ϕ = A B cos (ω t)$

$e = - N \frac{d ϕ}{d t}$

$e = - N \times (sin (2 π f t))$

At time $t = 0$ the emf will be zero because

$sin (ω t) = 0$

As the time progresses the emf keeps on increasing.

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Similar questions

Q. The graph shows the variation in magnetic flux

ϕ (t)

with time through a coil. Which of the statement given below is not correct.

(correct answer + 2, wrong answer - 0.50)

Q. A long solenoid of radius R carries a time

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I (t) = I_{0} t (1 - t)

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Q. A square loop of edge

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Q. At the moment

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particle leaves origin and moves in the positive direction of

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A wire loop is placed in a region of time varying magnetic field which is oriented orthogonally to the plane of the loop as shown in the figure.
The graph shows the magnetic field variation as the function of time.
Assume the positive emf is the one which drives a current in the clockwise direction and seen by the observer in the direction of B.
Which of the following graphs best represents the induced emf as a
function of time.

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Find the emf induced as a function of time it is zero at t=0 and is increasing in positive direction.

The magnetic flux is given as ϕ=A×B ϕ=ABcos(ωt) e=−Ndϕdt e=−N×(sin(2πft)) At time t=0the emf will be zero because sin(ωt)=0 As the time progresses the emf keeps on increasing.

Find the emf induced as a function of time it is zero at $t = 0$ and is increasing in positive direction.

The magnetic flux is given as

$ϕ = A \times B$

$ϕ = A B cos (ω t)$

$e = - N \frac{d ϕ}{d t}$

$e = - N \times (sin (2 π f t))$

At time $t = 0$ the emf will be zero because

$sin (ω t) = 0$

As the time progresses the emf keeps on increasing.