e/m ratio for an electron in electric and magnetic field is
Correct answer: B. E/(B2r)
- A. e/m =B r/E
- B. E/(B2r)
- C. E2/rB2
- D. B2/Er
Explanation
The currently accepted value for e/m is 1.758820 × 1011 C/kg. When an electron enters a region in which there is a uniform magnetic field, B, perpendicular to the velocity, v, of the electron (Caution: The capital letter V will be used below to represent voltage.
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
when charged particle enters the magnetic field parallel, it will:
When a charged particle enters the magnetic field parallel, it will:
An α-particle, a deuteron, and a proton are moving with the same momentum in a uniform magnetic field. The ratio of their speeds will be:
Force experienced by a moving change in a magnetic field is:
A charge of two microcoulombs (2 μC) moves with velocity of two meter per second (2 m/sec) in the direction of two Tesla magnetic field. The force that will act on it will be:
A charge projected with velocity of 10 m/s in a magnetic field of 10 T at an angle of 60°, if force exerted on charge is 2.78 x 10^-17 N, then value of charge is: