Home
Class 12
PHYSICS
As a charged particle q moving a veloci...

As a charged particle q moving a velocity `vec(v)` enters a uniform magnetic field `vec(B)`. It experiences a force `vec(f) = q (vec(v) xx vec(B))` For `theta = 0^(@)` or `180^(@), theta` being the angle between `vec(v)` and `vec(B)`. Force experienced is zero and particle passes undeflected. For `theta = 90^(@)`, the particle moves along a circule are and the magnetic force (qvB) provides the necessary centripetal force `((mv^(2))/(r ))`. For other values of `theta (theta != 0^(@), 180^(@), 90^(@))`, the charged particle moves along a helical path which is the resultant motion of simultaneous circular and translational motions.
suppose a particle that carries a charge of magnitude q and has a mass `4 xx 10^(-15) kg`. is moving in a region containing a uniform magnetic field `vec(B) = - 0.4 hat(k)T`. At a certain instant , velocity of the particle is `vec(v) = (8hat(i) - 6 hat(j) + 4 hat(k)) xx 10^(6)` m/s and force acting on it has a magnitude 1.6 N
Which of the three components of acceleration have non-zero values ?

A

x and y

B

y and z

C

z and x

D

x,y and z

Text Solution

Verified by Experts

The correct Answer is:
A
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

A point charge q moving with a velocity vecv at a given time in a magnetic field vecB experiences a force given as F = q [vec(v). vecB]

Prove that |vec(a) xx vec(b)|=(vec(a)*vec(b)) tan theta," where " theta is the angle between vec(a) and vec(b) .

Knowledge Check

  • As a charged particle q moving a velocity vec(v) enters a uniform magnetic field vec(B) . It experiences a force vec(f) = q (vec(v) xx vec(B)) For theta = 0^(@) or 180^(@), theta being the angle between vec(v) and vec(B) . Force experienced is zero and particle passes undeflected. For theta = 90^(@) , the particle moves along a circule are and the magnetic force (qvB) provides the necessary centripetal force ((mv^(2))/(r )) . For other values of theta (theta != 0^(@), 180^(@), 90^(@)) , the charged particle moves along a helical path which is the resultant motion of simultaneous circular and translational motions. suppose a particle that carries a charge of magnitude q and has a mass 4 xx 10^(-15) kg . is moving in a region containing a uniform magnetic field vec(B) = - 0.4 hat(k)T . At a certain instant , velocity of the particle is vec(v) = (8hat(i) - 6 hat(j) + 4 hat(k)) xx 10^(6) m/s and force acting on it has a magnitude 1.6 N Which of the following is correct?

    A
    motion of the particle is non-periodic but y and z - position co-ordinates vary in a periodic manner
    B
    motion of the particle is non-periodic but x andy - position co-ordinates vary in a periodic manner
    C
    motion of the particle is non-periodic but x and z - positio co-ordinates vary in a periodic manner
    D
    motion of the particle is periodic and all the position co-ordinates vary in a periodic mannar
  • As a charged particle 'q' moving with a velocity vec(v) enters a uniform magnetic field vec(B) , it experience a force vec(F) = q(vec(v) xx vec(B)). For theta = 0^(@) or 180^(@), theta being the angle between vec(v) and vec(B) , force experienced is zero and the particle passes undeflected. For theta = 90^(@) , the particle moves along a circular arc and the magnetic force (qvB) provides the necessary centripetal force (mv^(2)//r) . For other values of theta (theta !=0^(@), 180^(@), 90^(@)) , the charged particle moves along a helical path which is the resultant motion of simultaneous circular and translational motions. Suppose a particle that carries a charge of magnitude q and has a mass 4 xx 10^(-15) kg is moving in a region containing a uniform magnetic field vec(B) = -0.4 hat(k) T . At some instant, velocity of the particle is vec(v) = (8 hat(i) - 6 hat(j) 4 hat(k)) xx 10^(6) m s^(-1) and force acting on it has a magnitude 1.6 N Motion of charged particle will be along a helical path with

    A
    A translational component along x-direction and a circular component in the y-z plane
    B
    A translational component along y-direction and a circular component in the x-z plane
    C
    A translational component along z-axis and a circular component in the x-y plane
    D
    Direction of translational component and plane of circular component are uncertain
  • As a charged particle 'q' moving with a velocity vec(v) enters a uniform magnetic field vec(B) , it experience a force vec(F) = q(vec(v) xx vec(B)). For theta = 0^(@) or 180^(@), theta being the angle between vec(v) and vec(B) , force experienced is zero and the particle passes undeflected. For theta = 90^(@) , the particle moves along a circular arc and the magnetic force (qvB) provides the necessary centripetal force (mv^(2)//r) . For other values of theta (theta !=0^(@), 180^(@), 90^(@)) , the charged particle moves along a helical path which is the resultant motion of simultaneous circular and translational motions. Suppose a particle that carries a charge of magnitude q and has a mass 4 xx 10^(-15) kg is moving in a region containing a uniform magnetic field vec(B) = -0.4 hat(k) T . At some instant, velocity of the particle is vec(v) = (8 hat(i) - 6 hat(j) 4 hat(k)) xx 10^(6) m s^(-1) and force acting on it has a magnitude 1.6 N If the coordinates of the particle at t = 0 are (2 m, 1 m, 0), coordinates at a time t = 3 T, where T is the time period of circular component of motion. will be (take pi = 3.14 )

    A
    (2 m, 1 m, 0.942 m)
    B
    (0.142 m, 130m, 0)
    C
    (2 m, 1 m, 1.884 m)
    D
    (142 m, 130 m, 628 m)
  • Similar Questions

    Explore conceptually related problems

    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) ?

    An alpha particle moving with the velocity vec v = u hat i + hat j ,in a uniform magnetic field vec B = B hat k . Magnetic force on alpha particle is

    As a charged particle 'q' moving with a velocity vec(v) enters a uniform magnetic field vec(B) , it experience a force vec(F) = q(vec(v) xx vec(B)). For theta = 0^(@) or 180^(@), theta being the angle between vec(v) and vec(B) , force experienced is zero and the particle passes undeflected. For theta = 90^(@) , the particle moves along a circular arc and the magnetic force (qvB) provides the necessary centripetal force (mv^(2)//r) . For other values of theta (theta !=0^(@), 180^(@), 90^(@)) , the charged particle moves along a helical path which is the resultant motion of simultaneous circular and translational motions. Suppose a particle that carries a charge of magnitude q and has a mass 4 xx 10^(-15) kg is moving in a region containing a uniform magnetic field vec(B) = -0.4 hat(k) T . At some instant, velocity of the particle is vec(v) = (8 hat(i) - 6 hat(j) 4 hat(k)) xx 10^(6) m s^(-1) and force acting on it has a magnitude 1.6 N Angular frequency of rotation of particle, also called the cyclotron frequency' is

    A charge particle moves with velocity vec(V) in a uniform magnetic field vec(B) . The magnetic force experienced by the particle is

    When a charged particle moving with velocity vec(V) is subjected to a magnetic field of induction vec(B) the force on it is non-zero. This implies that: