Moving Charges ...

A charge q is moving with a velocity v parallel to a magnetic field B. Force on the charge due to magnetic field is

The following cases in which no force is exerted by a magnetic field on a charge is

Two streams of electrons are moving parallel to each other in the same direction. They_____

The coil of the moving coil galvanometer is wound over an aluminium frame

The restoring couple in the moving coil galvanometer is due to

Two streams of protons move parallel to each other in the same direction. They will

Imagine that you are seated in a room and there is a uniform magnetic field pointing vertically downwards in it . At the center of the room an electron is projected horizontally with a certain speed. The path of the electron in this field are:

In a moving coil galvanometer a radial magnetic field is applied with concave magnetic poles, to have
A) uniform magnetic field
B) the plane of the coil parallel to field
Choose the correct option among the following 

There will be no force experienced if

The radial magnetic field is used in a suspended coil galvanometer to provide