A point charge +Q is placed at point O as shown in the figure. Is the potential
difference VA – VB is positive, negative or zero?
a) Write the expression for the magnetic force acting on a charged particle moving with velocity v in the presence of magnetic field B.
b) A neutron, an electron and an alpha particle, moving with equal velocities, enter a uniform magnetic field going into the plane of paper, as shown. Trace their paths in the field and justify your answer.
i) Define mutual Inductance.
ii) A pair of adjacent coils has a mutual inductance of 1.5 H. If the current in one coil changes 20 A in 0.5 s, what is the change of flux linkage with the other coil?
i) Mutual Induction: It is the phenomenon in which a change of current in one coil induces an emf in another coil places near it. The coil in which the current changes is called the primary coil and the coil in which the emf is induced is called the secondary coil.
EMF induced is, e = - M .
So, the flux linked with the other coil is given by,