A long straight wire carries a current of 2A. An electron travels with a velocity of `4xx10^4ms^-1 `parallel to the wire 0.1mm from it, and in a direction opposite to the current. What force does the magnetic field of current exert on the moving electron. Charge on electron `=1.6xx10^(-19)C.`

A long straight wire AB carries a current of 4A. A proton P travels at 4x10^6ms^-1 parallel to the wire, 0.2m from it and in a direction opposite to the current as shown in figure. Calculate the force which the magnetic field of current exerts on the proton. Also specify the direction of the force.

An electron moving with a velocity of 10^7 ms^-1 enters a uniform magnetic field of 1 T along a direction parallel to the field. What would be its trajectory in this field?

A beam of electron is moving with a velocity of 3xx10^6ms^-1 and carries a current of 1muA . How many electrons are in 1 m of the beam?

A straight conductor carries a current of 1.5 A and is 2 m long. Find the force on it, when it is parallel to a uniform field of 2xx10^-2T

An electron is projected with a velocity of 10^5 ms^-1 at right angles to the magnetic field of 0.019 G. Caclculate the radius of the circle described by the electron.

A beam of electron is moving with a velocity of 3xx10^6ms^-1 and carries a current of 1muA . How many electrons per second pass a given point ?