A beam of electrons passed undeflected through mutually perpendicular electric and magnetic fields. If the electric field is switched off, and the same magnetic field is maintained, the electrons move:
Text Solution
Verified by ExpertsThe correct answer is:
B
If both electric and magnetic fields are present and perpendicular to each other and the particle is moving perpendicular to both of
them with 
. In this situation 
and 
But if electric field becomes zero, then only force due to magnetic field axists. Under this force, the charge moves along a circle.
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
Uniform electric and magnetic fields are produced in the same direction. An electron moves in such …
The distance between the plates of a parallel plate condenser is 4 mm and potential difference betw…
A beam of protons enters a uniform magnetic field of 0.3T with velocity of 4 × 10 5 m/s in a direct…
In a certain region of space electric field and magnetic field are perpendicular to each other an…
A charged particle with velocity 2 × 10 3 m/s passed undeflected through electric and perpendicular…
A charge particle moves in a region having a uniform magnetic field and a parallel, uniform electri…