What does “Potential as energy per charge” actually mean in Electrostatic Potential & Capacitance, and why does it matter for JEE?
Electric potential at a point is potential energy per unit test charge. Because it is a scalar, contributions from many source charges add algebraically with their signs.
In simple words: Electric potential at a point is potential energy per unit test charge. Because it is a scalar, contributions from many source charges add algebraically with their signs. Getting Potential as energy per charge clear matters because JEE questions on Electrostatic Potential & Capacitance usually test this idea directly, not just a formula you memorised.
Key point
Potential as energy per charge
Common mistake
adding potentials as vectors or dropping the sign of a negative source charge.
Memory tip
fields need directions; potentials need signs.
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