Home
Class 12
PHYSICS
An ionized gas contains both positive an...

An ionized gas contains both positive and negative ions . If it is subjected simultaneously to an electric field along the ` +x` - direction and a magnetic field along the ` +y` - direction and the negative ions towardws `-y` - direction

A

positive ions deflect towards ` +y-direction` and negative ions towards `- y direction`

B

all ions deflect towards ` +y -direction`

C

all ions deflect towards ` - y -direction`

D

positive ions deflect towards ` - y-direction` and negative ions towards `+ y direction`

Text Solution

Verified by Experts

The correct Answer is:
C
Case of positively charged particle :
Two forces are acting on the positively charged particle
(a) due to electric field in the positive ` x- direction`
(b) Force due to magnetic field.
` vec(F) = q (v hat(i)xxB hat(k)) rArr vec(F) = qvB hat(-j)`
this forces will move the positively charged particle towards ` Y - axis `.
Case of negatively charged particle.
Two forces are acting on the negatively charged particle
(a) due to eletric field in the negative ` x- direction` .
(b) due to magnetic field
` vec(F) = -q(vec(v)xxvec(B))`
vec(F) = -q[ v( hat (-i) xxB hat (k))]`
` vec (F) = -qvB[ hat(i) xx hat(k)] , vec(F) = qvB hat(-j)`
Same direction as that of positive charge .
(c) is the correct answer.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • MOVING CHARGES AND MAGNETISM

    SUNIL BATRA (41 YEARS IITJEE PHYSICS)|Exercise MCQs(d )|1 Videos

  • MODERN PHYSICS

    SUNIL BATRA (41 YEARS IITJEE PHYSICS)|Exercise MCQ (One Correct Answer|1 Videos

  • RAY AND WAVE OPTICS

    SUNIL BATRA (41 YEARS IITJEE PHYSICS)|Exercise JEE Main And Advanced|209 Videos

Similar Questions

Explore conceptually related problems

Position and negative ions are produced at the origin. If they are subjected simultaneously to an electric field along the +y -direction and magnetic field along +z -direction, then

What is the magnitude and direction of force on an electron moving along the direction of the magnetic field.

Knowledge Check

  • An electron is travelling along the x-direction. It encounters a magnetic field in the y-direction. Its subsequent motion wil be

    A
    Straight line along the x-direction
    B
    A circle in the `xz-` plnae
    C
    A circle in the `yz-` plnae
    D
    A circle in the `xy-` plnae

  • An electron is travelling along the x-direction. It encounters magnetic field in the y-direction. Its subsequent motion will be

    A
    straight line along the xz-direction
    B
    a circle in the xz-plane
    C
    a circle in the yz-plane
    D
    a circle in the xy-plane

  • An electron moving with a uniform velocity along the positive x -direction enters a magnetic field directed along the positive y -direction. The force on the electron is directed along

    A
    Positive `y-` direction
    B
    Negative `y`-direction
    C
    Positive `z`- direction
    D
    Negative `z`-direction

    • Similar Questions

    Explore conceptually related problems

    Positively charged particles are projected into a magnetic field. If the direction of the magnetic field is along the direction of motion of the charged particles, the particles get

    An electron moving with a uniform velocity along the positive x-direction enters a magnetic field directed along the positive y-directed along the force on the electron is directed along :

    An electron moving with a uniform velocity along the positive x-direction enters a magnetic field directed along the positive y-directed along the force on the electron is directed along :

    An electromagnetic wave is traveling in the positive x direction with its electric filed along the z axis and its magnetic field along the y axis . The fields are related by

    A proton is moving with a velocity of 5 xx 10^(5) m//s along the Y-direction. It is acted upon by an electric field of intensity 10^(5) V/m along the X-direction and a magnetic field of 1 Wb//m^(2) along the Z-direction. Then the Lorentz force on the particle is :

    Home
    Profile