Moving Charges ...

A loosely wound helix made of stiff wire is mounted vertically with the lower end just touching a dish of mercury when a current from the battery is started in the coil through the mercury

The magnetic field due to a current element is independent of :

Imagine that you are sitting in a room with your back to one wall and that an electron beam traveling horizontally from the back wall towards the front one is deflected towards the right. What is the direction of the magnetic induction field that exists in the room? 

An electron and a proton enter a magnetic field with equal velocities. The particle that experiences more force is

If the direction of the initial velocity of a charged particle is neither along nor perpendicular to that of the magnetic field, then the orbit will be:

A charge moving with velocity $$v$$ in $$X-$$ direction is subjected to a field of magnetic induction in the negative $$X$$ direction. As a result the charge will :

An electron of mass m is accelerated through a potential difference of V and then it enters a magnetic field of induction B normal to the lines of force. Then the radius of the circular path is

A free charged particle moves through a magnetic field. The particle may undergo a change in

The mono energetic beams of electrons moving along +y direction enter a region of uniform electric and magnetic fields. If the beam goes straight through these simultaneously, then field B and E are directed possibly along

A charged particle enters into a uniform magnetic field the parameter that remains constant is