Download App

STD 12 - 4. Moving charges and magnetism — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 12 - 4. Moving charges and magnetism4 Marks
MCQ
A beam of electrons passes undeflected through mutually perpendicular electric and magnetic fields. It the electric field is switched off, and the same magnetic field is maintained, the electrons move
  • A
    in an elliptical orbit
  • ✓
    in a circular orbit
  • C
    along a parabolic path
  • D
    along a straight line
✓

Answer

Correct option: B.
in a circular orbit
b
Electron travelling in a magnetic field perpendicular to its velocity - circular path.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

NEET STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Magnetic field due to $0.1\, A$ current flowing through a circular coil of radius $0.1\, m$ and $1000$ $turns$ at the centre of the coil is
→
Two infinitely long parallel conducting plates having surface charge densities $ + \sigma $ and $ - \sigma $ respectively, are separated by a small distance. The medium between the plates is vacuum. If ${\varepsilon _0}$ is the dielectric permittivity of vacuum, then the electric field in the region between the plates is
→
For a telescope to have large resolving power the
→
A long cylindrical vessel is half filled with a liquid. When the vessel is rotated about its own vertical axis, the liquid rises up near the wall. If the radius of vessel is $5\,cm$ and its rotational speed is $2$ rotations per second, then the difference in the heights between the centre and the sides, in $cm,$ will be
→
To obtain electrons as majority charge carriers in a semiconductor, the impurity mixed is
→
A point source of $100\,W$ emits light with $5 \%$ efficiency. At a distance of $5\,m$ from the source, the intensity produced by the electric field component is :
→
Two identical capacitors are arranged as shown. Work function of plate $1$ is $\phi  \ eV$ .The $emf$ of battery is $\frac{\phi }{e}$ . If energy of incident photon is $hv$ then maximum kinetic energy of $e^-$ reaching plate $2$ is 
→
When a sound wave of frequency $300 Hz$ passes through a medium the maximum displacement of a particle of the medium is $0.1 cm$. The maximum velocity of the particle is equal to
→
The work done in stretching an elastic wire per unit volume is 
→
An object is projected at an angle of $45^°$ with the horizontal. The horizontal range and the maximum height reached will be in the ratio.
→