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Sagot :
(b) Magnetic forces only
When an object is placed in an electric field it experiences an electric force given by :
[tex]F_{E}[/tex] = |q| × E
Similarly when it is placed in a magnetic field it experiences a magnetic force given by :
[tex]F_{B}[/tex] = |q|×v×Bsinθ
When a particle is placed in electric field the particle gets accelerated.
The electric field has a direction, positive to negative. This is the direction that the electric field will cause a positive charge to accelerate. For example If a positive charge is moving in the same direction as the electric field vector the particle's velocity will increase. If it is moving in the opposite direction it will decelerate. ( No change in direction of motion in this case)
When a particle is moved in magnetic field ,the magnetic force is perpendicular to velocity and magnetic field . Since force is perpendicular to velocity ,it only changes the direction of motion.
To know more about electric and magnetic forces kindly refer to the below link:
https://brainly.com/question/1594186
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