As shown in the figure, a magnet is moved with a fast speed towards a coil at rest. Due to this induced electromotive force, induced current and induced charge in the coil is E, I and Q respectively. If the speed of the magnet is doubled, the incorrect statement.
Correct answer: D. Q increase
- A. E increases
- B. Q remains same
- C. I increase
- D. Q increase
Explanation
The induced charge doesn't depend upon the speed of the magnet. With the increasing in the time rate of change flux, both induced emf and current increase. But the induced charge does not depend upon time. So, it would remain the same. Hence charge remains same, and e and I will increases.
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About Electromagnetism
Magnetic flux density and magnetic flux describe the strength of a magnetic field and the field passing through a surface. A charged particle moving through a magnetic field experiences a force perpendicular to its velocity and may follow circular or helical motion, depending on the angle between velocity and field.
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