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When we consider a point charge q moving with a velocity vecv at a given time in presence of magnetic field vecB, the charged particle experiences a magnetic force vecF_m = q[vecv xx vecB]. The force was first given by H.A. Lorentz and is called the Lorentz magnetic force. The force depends on q, vecv and vecB and involves a vector product of vecv and vecB. The force acts in a side ways direction perpendicular to both the velocity and magnetic field and the direction is given by right hand thumb rule for vector product. Obviously force on a negative charge is opposite to that on a positive charge. A charged particle is placed at rest at a point P whose coordinates are (2,3,0) and a magnetic field vecB = 5 xx 10^(-3) hatk is present here. What is the magnetic force experienced by the charge ? |
| Answer» SOLUTION :MAGNETIC force on the CHARGE is zero because it is at rest i.e, its velocity `VECV` is zero. | |