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When a wire loop is rotated in a magnetic field, the direction of induced emf changes once in each
- a)2 revolutions
- b)1 revolution
- c)1/2 revolution
- d)12 revolution
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
When a wire loop is rotated in a magnetic field, the direction of indu...
Flux of the magnetic field through the loop is ϕ=Bπr2coswt
Where θ= angle the normal makes with the portion of the loop in duced emf.
∈=wBπr2sinwt
These is zero when wt=nπ ie
When θ=0,π,2π.... etc.
So, the induced emf changes direction every half rotation.
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When a wire loop is rotated in a magnetic field, the direction of indu...
Explanation:
When a wire loop is rotated in a magnetic field, an emf is induced in the loop due to the change in magnetic flux. The direction of induced emf changes as the loop rotates.
The direction of induced emf is determined by Lenz's law, which states that the direction of induced emf is such that it opposes the change that produced it.
When the wire loop is rotated in a magnetic field, the magnetic flux through the loop changes. The direction of induced emf is such that it opposes this change in magnetic flux.
The direction of induced emf changes once in each half revolution of the loop. This means that the direction of induced emf changes twice in each full revolution of the loop.
Therefore, the correct answer is option C, which states that the direction of induced emf changes once in each half revolution of the loop.
When a wire loop is rotated in a magnetic field, an emf is induced in the loop due to the change in magnetic flux. The direction of induced emf changes as the loop rotates.
The direction of induced emf is determined by Lenz's law, which states that the direction of induced emf is such that it opposes the change that produced it.
When the wire loop is rotated in a magnetic field, the magnetic flux through the loop changes. The direction of induced emf is such that it opposes this change in magnetic flux.
The direction of induced emf changes once in each half revolution of the loop. This means that the direction of induced emf changes twice in each full revolution of the loop.
Therefore, the correct answer is option C, which states that the direction of induced emf changes once in each half revolution of the loop.
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Community Answer
When a wire loop is rotated in a magnetic field, the direction of indu...
Since for each half revolution ,current flows in opposite directions
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