JEE MainPhysicsAlternating CurrentNumerical+4 / −1
In an ac generator, a rectangular coil of 100 turns each having area is rotated at about an axis perpendicular to a uniform magnetic field of magnitude . The maximum value of the emf produced will be . Take
Numerical answer
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Correct answer: 1584
- Given data
- Number of turns:
- Area of each turn:
- Magnetic field:
- Rotation speed:
We need the maximum emf induced in the rotating coil.
- Formula for maximum emf in an AC generator
For a coil rotating in a uniform magnetic field,
where is the angular speed.
- Convert rotational speed to angular speed
Given:
Now,
Using ,
- Substitute into the formula
First simplify:
So,
Thus,
- Final answer
- Comparison with stored correct answer
Stored correct answer =
My derived answer matches it exactly.
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