An electron is travelling with a velocity of 106 m/s, perpendicular to a field of strength 1 W/m2. The magnetic force on the electron will be (Note: Take the charge of an electron as 1.6 x 10^-19 C.)
Correct answer: B. 1.6 x 10^-13 N.
- A. 1.6 x 10^-25 N.
- B. 1.6 x 10^-13 N.
- C. 1.6 x 10^13 N.
- D. 1.6 x 10^25 N
Explanation
The magnetic force on a charged particle moving perpendicular to a magnetic field is calculated using the formula F = qvB, where q is the charge, v is the velocity, and B is the magnetic field strength. Here, q = 1.6 × 10-19 C, v = 106 m/s, and B = 1 W/m2. Substituting these values, the force F is calculated as 1.6 × 10-13 N, which is the correct choice (Option B). Options A, C, and D are incorrect as they result from calculation errors, either underestimating or overestimating the magnitudes.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Charged Particle in a Magnetic Field
A charged particle moving through a magnetic field experiences the Lorentz force, which is perpendicular to both its velocity and the field. The motion may be circular or helical, with questions involving radius, angular frequency, time period, and work done. A stationary charge feels no magnetic force.
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 Charged Particle in a Magnetic Field questions
If a charged particle of 2 C moves with a velocity of 3 m/s perpendicular to a magnetic fieldof 1 T, then the magnetic force acting on the particle will be
W.O.F does not effect the motion of moving electron?
A charge is at rest in a magnetic field, then the magnetic force on charge is:
When a charged particle moves through a magnetic field, the effect of the field changes the particle's
The magnetic force experienced by a charged particle moving in a magnetic field will beminimum when it moves
When charge particle enters in the uniform magnetic field, the magnetic force will be equal: