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.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
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.
Practise Electromagnetism
1,176 free Electromagnetism MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Electromagnetism questions
To induce an emf in a coil the linking magnetic flux:
When a wire loop is rotated in two poles of magnetic field, the direction of e.m.f. change once in every:
When the magnet is in motion relative to a coil, an induced e.m.f. is produced. It does not depend upon:
Two different loops are concentric and lie in the same plane. The current in the Outer loop is clockwise and increasing with time. The induced current in the inner loop then, is:
When a coil of cross-sectional area A and number of turns N is rotated in a uniform magnetic field B with angular velocity ω, then the maximum emf induced in the coil will be
Which quantity is increased in step down transformer?