If a charged particle at rest experiences no electromagnetic force

If a chraged particle at rest experiences no electromagnetic force, (i) the electric field must be zero (ii) the magnetic field must be zero (iii) the electric field may or may not be zero (iv) the magnetic field may or may not be zero

If a charged particle kept at rest experiences an electromagnetic force,

Assertion In non-uniform magnetic field speed of a charged particle varies. Reason Work done by magnetic force on a charged particle is always zero.

A charged particle is at rest in the region where magnetic field and electric field are parallel. The particle will move in a

A He^(2+) at rest experiences an electromagnetic force. Then (where E is electric field and is B magnetic field)

Assertion: Power of a magetic force on a charged particle is always zero. Reason: Power of electric force on charged particle cannnot be zero.

A charged particle experience magnetic force in the presence of magnetic field. Which of the following statement is correct?

Three charged particle sare in equilibrium under their electrostatic forces only. Then

(A): Two particles of same charge projected with different velocity normal to electric field experience same force (R ): A charged particle experiences force, independent of velocity in electric field

A velocity filter uses the properties of electric and magnetic field to select particles that are moving with a specifice velocity. Charged particles with varying speeds are directed into the filter as shown. The filter consistt of an electric field E and a magnetic field B, each of constant magnitude, directed perpendicular to each other as shown, The charge particles will experience a force due to electric field given by F = qE. If positively charged particles are used, this force is towards right. The moving particle will also experience a force due to magnetic field given by F = qvB . When forces due to the two fields are of equal magnitude, the net force on the particle will be zero, the particle will pass through centre with its path unaltered. The electric and magnetic fields can be adjusted t choose the specific velocity to be filtered. The efect of gravity can be neglected. The electric and magnetic fields are adjusted to detect particles with positive charge q of certain speed v_(0) . which of the following expressions is equal to this speed?