In the formula F=q(v×B):
Correct answer: D. F must be perpendicular to both v and B
- A. F must be perpendicular to v but not necessarily to B
- B. F must be perpendicular to B but not necessarily to v
- C. v must be perpendicular to B but not necessarily to F
- D. F must be perpendicular to both v and B
Explanation
The formula describes a vector cross product. A fundamental property of the cross product is that the resulting vector (F) is always perpendicular to the plane formed by the two original vectors (v and B). Therefore, the force is perpendicular to both velocity and the magnetic field.
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
In a certain region, a magnetic field is directed vertically downward. If a plane flies due South, which part of the plane will be negatively charged?
A charge in uniform motion produces:
The value of _ around a current carrying wire is found by Ampere's circuital law.
If the direction of current in the conductor and the magnetic field are the same, in which way will the conductor move?
A long straight wire carries a current from east to west.A magnetic compass is placed 1meter directly north of the wire at the same horizontal level.Which direction will the north pole of the compass needle point due to magnetic field of the wire?
The magnetic field outside a long straight current-carrying wire depends on the distance "R" from the wire axis according to: