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H) Field Intensity and Distance
 

1) Spherical point charge

Field intensity varies inversely with the square of distance

Double distance from charge,

the field intensity ....

is quartered

2. Charged Rod - the field intensity varies inversely with distance

If the distance to the rod is reduced to 1/3 its original distance, the electric field intensity ...

would be 3 times greater

Electric Field Strength and distance

St. Mary's Physics Online

Electric Potential