Moving Charges ...

A proton is moving with a velocity of $$3\times 10^7 m/s$$ in the direction of a uniform magnetic field of $$0.5 T$$. The force acting on proton is

Two parallel wires P and Q carry electric currents of $$10 A$$ and $$2 A$$ respectively in mutually opposite directions. The distance between the wires is $$10 cm$$. If the wire P is of infinite length and wire Q is $$2 m$$ long, then the force acting Q will be

The force between two parallel conductors, each of length $$50 m$$ and distant $$20 cm$$ apart, is $$1 N$$. If the current in one conductor is double than that in another one, then their values will respectively be :

On passing electric current in two long straight conductors in mutually opposite directions, the magnetic force acting between them will be

Two current-carrying parallel conductors are shown in the figure. The magnitude and nature of force acting between them per unit length will be :

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?

There is a magnetic field acting in a plane perpendicular to this sheet of paper, downward into the paper as shown in the figure. The particles in vacuum move in the plane of paper from left to right. The path indicated by the arrow could be traveled by :

Current of 10 ampere and 2 ampere are passed through two parallel wires A and B, respectively in opposite directions. If the wire A is infinitely long and the length of the wire B is 2 m, the force on the conductor B which is situated at 10 cm distance from A will be

Two long parallel wires are at a distance of 1 metre. Both of them carry one ampere of current. the force of attraction per unit length between the two wires is

The initial acceleration of the proton is