An electron is not deflected in passing through a certain region of space. Can we be sure that there is no magnetic field in that region?

A certain region of space isto be shielded from magnetic fields. Suggest a method.

In a certain arrangement, a proton does not get deflected while passing through a magnetic field region.Under what condition is it possible?

Can we produce a pure electric or magnetic waves in space? Why?

Photons are not deflected in electric and magnetic field as they are

An electric potential is 10V throughout the space in a sphere of radius 0.2m^3 . What is the electric field in this region?

An electric current passes through a straight wire. At a distance 5 cm from the wire the magnetic field is B. The field at 20 cm from the wire would be

How many lines can be drawn passing through two distinct points

A uniform magnetic field of 1.5 T exists in a cylindrical region of radius 10.0 cm, its direction parallel to the axis along east to west. A wire carrying current of 7.0 A in the north to south direction passes through this region. What is the magnitude and direction of the force on the wire. If, the wire in the N - S direction is lowered from the axis by a distance of 6.0 cm ?

An electron emitted by a heated cathode and accelerated through a potential difference of 2.0 kV, enters a region with uniform magnetic field of 0.15 T. Determine the trajectory of the electron if the field makes an angle of 30^@ with the initial velocity .