Question

What is the charge Q? The electric field at point P is zero

Answer 1

Answer:

Electric Potential V of a Point Charge

The potential at infinity is chosen to be zero. Thus V for a point charge decreases with distance, whereas E for a point charge decreases with distance squared: E=Fq=kQr2 E = F q = k Q r 2 .

Answer 2

Answer:

The potential at infinity is chosen to be zero. Thus V for a point charge decreases with distance, whereas E for a point charge decreases with distance squared: E=Fq=kQr2 E = F q = k Q r 2 . Recall that the electric potential V is a scalar and has no direction, whereas the electric field E is a vector.

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