Moving Charges ...

The magnetic filed (dB) due to smaller element (dl) at a distance $$(\vec r)$$ from element carrying current i, is

Three long, straight and parallel wires are arranged as shown in figure. The force experienced by $$10cm$$ length of wire $$Q$$ is

A current $$i$$ ampere flows along an infinitely long straight thin walled tube, then the magnetic induction at any point inside the tube is

A charge particle enters into a magnetic field with a velocity vector making an angle of $$30^o$$ with respect to the direction of magnetic field. The path of the particle is:

An electron is ejected from the surface of a long, thick straight conductor carrying a current, initially in a direction perpendicular to the conductor. The electron will

A current of $$\dfrac{1}{(4\pi)}$$ ampere is flowing in a long straight conductor. The line integral of magnetic induction around a closed path enclosing the current-carrying conductor is

A stream of electrons is projected horizontally to the right. A straight conductor carrying a current is supported parallel to the electron stream and above it. If the current in the conductor is from left to right, what will be the effect on the electron stream?

If long hollow copper pipe carries a direct current, the magnetic field associated with the current will be:

Two parallel wires carrying currents in the same direction attract each other because of

A small current element of length $$dl$$ and carrying current is placed at $$(1, 1, 0)$$  and is carrying current in '$$+z$$' direction. If magnetic field at origin be $$\overrightarrow{B}_1$$ and at point  $$(2, 2, 0)$$ be $$\vec B_2$$ then