Moving Charges ...

A and B are two like parallel forces. A couple of moment H lies in the plane of A and B and is contained with them. The resultant of A and B after combining is displaced through a distance 

Two long conductors, separated by a distance d carry current $$I_1$$ and $$I_2$$ in the same direction. They exert a force F on each other. Now the current in one of them is increased to two times and its direction is reversed. the distance is also increased to 3d. The new value of the force between them is

The AC voltage across a resistance can be measured using a

A particle of mass $$\mathrm{M}$$ and charge $$\mathrm{Q}$$ moving with velocity $$\vec{V}$$ describes a circular path of radius $$\mathrm{R}$$ when subjected to a uniform transverse magnetic field of induction B. The work done by the field when the particle completes one full circle is

Wires 1 and 2 carrying currents $$i_1$$ and $$i_2$$ respectively are inclined at an angle $$\theta$$ to each other. What is the force on a small element d$$l$$ of wire 2 at a distance of r from wire 1 (as shown in figure) due to the magnetic field of wire 1?

A particle of mass M and charge Q moving with velocity $$\vec v$$ describe a circular path of radius R when subjected to a uniform transverse magnetic field of induction B. The work done by the field when the particle completes one full circle is

A charged particle moves through a magnetic field perpendicular to its direction. Then

A particle of charge $$-16\times 10^{-18}$$ coulomb moving with velocity 10 $$\mathrm{m}\mathrm{s}^{-1}$$ along the x-axis enters a region where a magnetic field of induction $$\mathrm{B}$$ is along the $$\mathrm{y}$$ -axis, and an electric field of induction $$\mathrm{B}$$ is along the $$\mathrm{y}$$-axis, and an electric field of magnitude $$10^{4}\mathrm{V}/\mathrm{m}$$ is along the negative $$\mathrm{z}$$-axis. lf the charged particle continues moving along the $$\mathrm{x}$$-axis, the magnitude of $$\mathrm{B}$$ is

A charged particle moves through a magnetic field perpendicular to its direction. Then

Two long conductors, separated by a distance $$d$$ carry currents $$I_1$$ and $$I_2$$ in the same direction. They exert a force $$F$$ on each other. Now the current in one of them is increased to two times and its direction is reversed. The distance is also increased to $$3d$$. The new value of the force between them is: