The force acting on a charge q moving with velocityin a magnetic field is given by
Find the magnetic force when a charge 3.5C with flux density of 4 units is having a velocity of 2m/s.
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An electron with a speed of 1.8 x 106 m/s is moving in a circular orbit in a uniform magnetic field of 10-4 Wb/m², the radius of the circular path of the electron is
A uniform electric field and a uniform magnetic field are produced, pointed in the same direction. An electron is projected with its velocity pointing in the same direction
A proton enters a magnetic field with a velocity of 1.5 x 105 m/s making an angle of 30° with the field. What is the force experienced by the proton if B = 3.0 T.
A Charge is fired through a magnetic field. The magnetic force acting on it is maximum when the angle between the direction of motion and magnetic field is
When a charged particle moves in a magnetic field, its kinetic energy always
A proton carrying 1 MeV kinetic energy is moving in a circular path of radius R in the uniform magnetic field. What should be the energy of an alpha particle to describe a circle of the same radius in the same field.
An electron is moving in a circular orbit in a magnetic field 2 x 10-3 Wb/m², the time period of electron is
The frequency (v) of charged particle, moving at right angles to the magnetic field is independent of
The magnetic susceptibility of a material of a rod is 449. Permeability of vacuum is 4π x 10-7 henry/metre. The absolute permeability of the material of the rod (in henry/metre) is
A bar magnet of magnetic moment 2.0 JT-1 lies aligned with the direction of a uniform magnetic field of 0.25 T. What is the work done to turn the magnet so as to align its magnetic moment opposite to the field direction?
A magnet of magnetic moment M and length 2l is bent at its mid-point such that the angle of bending is 60°. Now, the magnetic moment is
Two identical thin bar magnets are placed mutually at right angles, such that the north pole of one touches the south pole of the other. The length and the pole strength of each bar are L and m, respectively. The resultant magnetic moment of the system is
A bar magnet used in a vibration magnetometer is heated, so as to reduce its magnetic moment by 36%. The time period of the magnet (neglecting the changes in the dimension of the magnet) :
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