Home
Class 12
PHYSICS
A particle of mass m and charge q is pro...

A particle of mass m and charge q is projected into a uniform magnetic field `underset(B)to=-B_(0)hatK` with velocity `underset(V)to-V_(0)hati` from origin. The position vector of the particle at time t is `underset(r)to`. Find the impulse of magnetic force on the particle by the time `underset(r)to.underset(V)to` becomes zero for the first time.

Text Solution

Verified by Experts

The correct Answer is:
`2 mv_(0)hati`
Promotional Banner

Topper's Solved these Questions

  • MOTION OF CHARGE IN MAGNETIC FIELD

    ARIHANT|Exercise Level-2|13 Videos

  • MOTION OF CHARGE IN MAGNETIC FIELD

    ARIHANT|Exercise Level-3|4 Videos

  • MAGNETIC EFFECT OF CURRENT

    ARIHANT|Exercise Magnetic effect of Current|45 Videos

  • NUCLEAR PHYSICS

    ARIHANT|Exercise All Questions|54 Videos

Similar Questions

Explore conceptually related problems

A particle of specific charge alpha enters a uniform magnetic field B=-B_0hatk with velocity v=v_0hati from the origin. Find the time dependence of velocity and position of the particle.

A charge particle of mass m and charge q is projected with velocity v along y-axis at t=0. Find the velocity vector and position vector of the particle vec v (t) and vec r (t) in relation with time.

A particle of specific charge alpha is projected from origin with velocity v=v_0hati-v_0hatk in a uniform magnetic field B=-B_0hatk . Find time dependence of velocity and position of the particle.

A particle of charge q and mass m is prjected in a uniform and contant magnetic field of strength B .The initial velocity vecv makes angle theta with the vecB .Find the distance travelled by the particle in time t .

A particle having mass m and charge q is projected with a velocity v making an angle q with the direction of a uniform magnetic field B. Calculate the magnitude of change in velocity of the particle after time t=(pim)/(2qB) .

A particle of mass m and charge + q is projected from origin with velocity vec(V)=V_(0)hati in a magnetic field vec(B)=-(B_(0)x)hatk. Here V_(0) and B_(0) are positive constants of proper dimensions. Find the radius of curvature of the path of the particle when it reaches maximum positive x co-ordinate.

A particle of mass m and charge q is moving in a region where uniform electric field underset(E)to and and uniform mag-netic field underset(B)to are present. It is given that underset(E)to/|vec(E)|=underset(B)to/|vec(B)|. At time t = 0, velocity of the particle is underset(V)to_(0) and underset(V)to_(0).underset(E)to=0. Write the velocity of the particle at time t.

A positive charge particle of charge q and mass m enters into a uniform magnetic field with velocity v as shown in Fig. There is no magnetic field to the left of PQ. Find (a) time spent, (b) distance travelled in the magnetic field, (c) impulse of magnetic force.

A particle of mass m and having a positive charge q is projected from origin with speed v_(0) along the positive X-axis in a magnetic field B = -B_(0)hatK , where B_(0) is a positive constant. If the particle passes through (0,y,0), then y is equal to