а. Where is the electric field stronger, point A or point B? Explain using physical reasoning. b. If a proton is fired from point B toward point C, will its speed at C be greater than, less than, or the same as B? Explain using physical reasoning.
Electric Field
The electric field is a region in space around a charge or a system of charges such that if a test charge is brought into the region, it will experience a force due to the source charges.
The magnitude of the electric field strength due to a point charge at a distance from it is
Electric Potential
The electric potential at a point is the amount of work done by an external agency in bringing a unit positive charge from infinity to that point under the influence of the electric field produced by other charges.
The electric potential due to a point charge at a distance from it is
If we have two equipotential surfaces such that the potential difference between the equipotential surfaces is and the distance between them is , the electric field between the two surfaces is
Here is known as the potential gradient.
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