A proton and an alpha particle are separately projected in a region where a uniform magnetic field e

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4.Moving Charges and Magnetism

medium

A proton and an alpha particle are separately projected in a region where a uniform magnetic field exists. Their initial velocities are perpendicular to direction of magnetic field. If both the particles move around magnetic field in circles of equal radii, the ratio of momentum of proton to alpha particle $\left( {\frac{{{P_p}}}{{{P_\alpha }}}} \right)$ is

$1$

$0.5$

$2$

$0.25$

Solution

(b) $r = \frac{p}{{qB}}$ $==>$ $p$ $\propto$ $q$ ( $r$ and $B$ are constant)
$\frac{{{p_p}}}{{{p_\alpha }}} = \frac{{{q_p}}}{{{q_\alpha }}} = \frac{{{q_p}}}{{(2{q_p})}} = \frac{1}{2}$

Standard 12

Physics

A particle of mass $M$ and charge $Q$ moving with velocity $\mathop v\limits^ \to $ describes a circular path of radius $R$ when subjected to a uniform transverse magnetic field of induction $B$. The work done by the field when the particle completes one full circle is

easy

(AIEEE-2003)

A collimated beam of charged and uncharged particles is directed towards a hole marked $P$ on a screen as shown below. If the electric and magnetic fields as indicated below are turned $ON$

medium

(KVPY-2020)

An electron is projected with velocity $\vec v$ in a uniform magnetic field $\vec B$ . The angle $\theta$ between $\vec v$ and $\vec B$ lines between $0^o$ and $\frac{\pi}{2}$ . It velocity $\vec v$ vector returns to its initial value in time interval of

medium

An electron with energy $880 \,eV$ enters a uniform magnetic field of induction $2.5 \times 10^{-3}\,T$. The radius of path of the circle will approximately be :

medium

An electron is projected with velocity $v_0$ in a uniform electric field $E$ perpendicular to the field. Again it is projetced with velocity $v_0$ perpendicular to a uniform magnetic field $B/$ If $r_1$ is initial radius of curvature just after entering in the electric field and $r_2$ is initial radius of curvature just after entering in magnetic field then the ratio $r_1:r_2$ is equal to

normal

Solution

Similar Questions

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