Acharged particle moving along the +x-axis enters a uniform magnetic field pointing along the +z-axis. because of an electric field along the +y-axis, the charge particle does not change velocity. what is the sign of this particle? 35) a) positive b) negative c) the particle could be either positive or negative. d) none of the above choices is correct.

Explanation:

A charged particle moving along the +x-axis enters a uniform magnetic field pointing along the +z-axis. Because of an electric field along the +y-axis, the charge particle does not change velocity.

As both electric and magnetic field is acting on the charged particle. The Lorentz force will act on it which is given by :

q is the charged particle

v is the velocity of the particle

B is the magnetic field

Let the charge particle is positive. The magnetic force will act on it in -y axis using right hand rule. As the direction of electric force is in +y axis, then the electric field is same as electric force i.e. +y axis. As a result both forces cancel out each other.

Similarly, let the charge particle is negative. According to right hand rule, the magnetic force is acting in +y axis. If the charge is negative, the direction of electric field is in opposite direction to the electric force. Thus the electric force is in -y axis. As a result, the both forces cancel out each other.

Hence, the charge can be either positive or negative. Hence, the correct option is (c) "The particle could be either positive or negative".

they should be similar or the same

the answer is b i think