A point Charge in an External Electric Field

 

Situation

Negative Charge

Positive Charge

 

vo = 0

Accelerate opposite to E

Accelerate in the direction of E

 

q = 0 (vo and E are parallel )

       - Decelerate

- Stop momentarily

       - Reverse direction

       - Depends on the length of the region where E exists

Continue moving in the same direction with acceleration

 

        

 

Situation

Negative Charge

Positive Charge

 

q = 180o ( vo and E are anti-parallel )

Continue moving in the same direction with acceleration

       - Decelerate

       - Stop momentarily

       - Reverse direction

       - Depends on the length of the region where E exists

        

 

0 < q < 180 o

 

Projectile motion

 

Projectile motion