Home
Class 12
PHYSICS
(a) Write the expression for the force v...

(a) Write the expression for the force `vecF` acting on a particle of mass m and charge q moving with velocity `vecv` in a magnetic field `vecB`. Under what conditions will it move in (i) a circular path and (ii) a helical path?
(b) Show that the kinetic enery of the particle moving in magnetic field remains constant.

Text Solution

Verified by Experts

(a) (i) If direction of `vecv` is at right angles to that of `vecB`, the charged particles will moave in a circular path.
(ii) If `vecv` is inclined to `vecB` at an angle `theta`, where `theta != 0^@` or `pi/2` or `pi`, the charged particle will move in a helical path.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • MOVING CHARGES AND MAGNETISM

    U-LIKE SERIES|Exercise LONG ANSWER QUESTIONS-II|11 Videos

  • MOVING CHARGES AND MAGNETISM

    U-LIKE SERIES|Exercise SELF ASSESSMENT TEST (SECTION A) (MULTIPLE CHOICE QUESTIONS)|5 Videos

  • MOVING CHARGES AND MAGNETISM

    U-LIKE SERIES|Exercise SHORT ANSWER QUESTIONS|41 Videos

  • MODEL TEST PAPER 3 (UNSOLVED)

    U-LIKE SERIES|Exercise SECTION A|3 Videos

  • NUCLEI

    U-LIKE SERIES|Exercise Self Assessment Test|10 Videos

Similar Questions

Explore conceptually related problems

Show that the kinetic energy of the particle moving in a magnetic field remains constant

(a) Write the expression for the force vecF acting on a particle of mass m and charge q moving with velocity vecv in a magnetic field vecB . Under what conditions will it move in (a) a circular path and (ii) a hetical path?

Knowledge Check

  • A charged particle is moving with velocity Vin magnetic field

    A
    Its momentum changes but total energy remains same
    B
    both momentum and total energy remains same
    C
    both momentum and total energy change
    D
    total energy changes but momentum remains the same

  • The force acting on a particle of charge q moving in a uniform magnets field with velocity v is

    A
    parallel to both `vecv` and `vecB`
    B
    perpendicular to both `vecv` and `vecB`
    C
    parallel to `vecv` and perpendicular to `vecB`
    D
    perpendicular to `vecv` and parallel to `vecB`

  • The force on a charged particle moving with a velocity oversettov in a magnetic field oversettoB is :

    A
    perpendicular to both `oversettov` and `oversettoB`
    B
    maximum, if `ovrsettov` perpendicular to `oversettoB`
    C
    maximum, if `ovrsettov` parallel to `oversettoB`
    D
    zero, if `ovrsettov` is parallel to `oversettoB`

    • Similar Questions

    Explore conceptually related problems

    Write the expression for the magnetic force acting on a, charged particle moving with velocity v in the presence of magnetic field B.

    What is the direction of the force acting on a charged. Particle q moving with a velocity vecv in a uniform magnetic field vecB ?

    Write the expression for Lorentz magnetic force on a particle of charges 'q' moving with velocity overset(rightarrow)v in a magnetic field overset(rightarrow)B .

    What is the direction of the force acting on a charged particle q, moving with a velocity vec(v) a uniform magnetic field vec(B) ?

    Write the expression, in a vector form, for the Lorentz magnetic force vecF due to a charge moving with velocity vecV in a magnetic field vecB . What is the direction of the magnetic force?

    Home
    Profile