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 wire ab of length $l$, mass $m$ and resistance $R$ slides on a smooth, thick pair of mettalic rails joined at the bottom as shown in figure. The plane of the rails makes an angle $\theta $ with the horizontal. A verticle magnetic field $B$ exists in the region. If the wire slides on the rails at a constant speed $v$, then which of the following can be correct for $B$ ?
If the magnetic flux is expressed in weber, then magnetic induction can be expressed in
In the $AC$ network shown in figure, the rms current flowing through the inductor and capacitor are $0.6A$ and $0.8A$ respectively. Then the current coming out of the source is
Image
A plane wavefront $(\lambda = 6 \times {10^{ - 7}}m)$ falls on a slit $0.4\,mm$ wide. A convex lens of focal length $0.8\,m$ placed behind the slit focusses the light on a screen. What is the linear diameter of second maximum......$mm$
The total charge induced in a conducting loop when it is moved in magnetic field depend on
Check the incorrect statement: When a magnet is moved into a coil the strength of the current depends on:
Currents of a $10\, ampere$ and $2\, ampere$ are passed through two parallel thin wires $A$ and $B$ respectively in opposite directions. Wire $A$ is infinitely long and the length of the wire $B$ is $2\, m$. The force acting on the conductor $B$, which is situated at $10\, cm$ distance from $A$ will be
An $e.m.f$. of $12\, volt$ is produced in a coil when the current in it changes at the rate of $45$ $amp/minute$. The inductance of the coil is.......$henry$
A plastic disc of radius $R$ has a charge $q$ uniformly distributed over its surface. If the disc is rotated at an angular frequency $\omega$ about it axis, the induction at the center of the disc is :-
In the circuit shown in figure, the power which is dissipated as heat in the $6\,\Omega$ resistor is $6\,W$. What is the value of resistance $R$ in the circuit?................... $\Omega$