Embibe Experts Solutions for Chapter: Magnetic Effect of Current, Exercise 2: Exercise (Conceptual Questions)

Two infinite length wires carry equal current and placed along x and y-axis respectively. At which points the resultant magnetic field is zero ?

For given current distribution, each infinite length wire produces magnetic field ’B’ at origin then resultant magnetic field at origin ’O’ is :-

Two concentric co-planner coils of equal turns have radii$10 \mathrm{cm}$ and $30 \mathrm{cm}$ Respectively. Same current flowing in both the coils in same direction. Now direction of current is reversed in one coil then ratio of magnetic field at their common centre in two conditions respectively :-

Two concentric co-planar coils of turns $n_1$ and $n_2$ have radii ratio $2:1$, respectively. Equal currents in both the coils flow in opposite directions. If net magnetic field is zero at their common centre, then $n_1:n_2$ is,

Find out magnetic field at point ’O’ for the following current distributions. 
                      

Find out magnetic field at point $O$ for the following current distributions.

Find out magnetic field at point $O$ for the following current distributions.

A conducting rod moves towards right with constant velocity $v$ in uniform transverse magnetic field. Graph between force applied by the external agent v/s velocity and power supplied by the external agent v/s velocity: