MCQ
Which particles will have minimum frequency of revolution when projected with the same velocity perpendicular to a magnetic field
  • $Li^+$
  • B
    Electron
  • C
    Proton
  • D
    $H{e^ + }$

Answer

Correct option: A.
$Li^+$
a
(a) $\nu = \frac{{qB}}{{2\pi m}} \Rightarrow \nu \propto \frac{q}{m}$
${\left( {\frac{q}{m}} \right)_{L{i^ + }}}$is minimum so $\nu_{{Li^+}}$ is minimum.

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

Similar questions

A ray passes through a prism of angle $60^o$ in minimum deviation position and suffers a deviation of $30^o $. What is the angle of incidence on the prism......$^o$
Which of the curves in figure represents the relation between Celsius and Fahrenheit temperatures
the magnetic induction at $O$ due to the whole length of the conductor is
A uniform circular disc of radius $a$ is taken. A circular portion of radius $b$ has been removed from it as shown in the figure. If the centre of hole is at a distance $c$ from the centre of the disc, the distance $x_2$ of the centre of mass of the remaining part from the initial centre of mass $O$ is given by
Which of the following physical quantities has a unit but no dimensions ?
The maximum force, in addition to the weight required to pull a wire of $ 5.0\, cm$ long from the surface of water at temperature $20^\circ C$, is $728 $ dynes. The surface tension of water is
Two masses $m_1$ and $m_2$ are suspended together by a massless spring of constant $K$. When the masses are in equilibrium, $m_1$ is removed without disturbing the system. The amplitude of oscillations is
In a parallel beam of white light is incident on a converging lens, the colour which is brought to focus nearest to the lens is
Two particles in same vertical plane are thrown to strike at same time. One from ground and other from height $h$ vertically above it. Ground particle is thrown obliquly and it achives a maximum height $H$. The second particle is thrown horizontally with same speed. What can be maximum $h$ so that two particles strike in air.
A moving coil galvanometer has $N$ number of turns in a coil of effective area $A$, it carries a current $I$. The magnetic field $B$ is radial. The torque acting on the coil is