Couple of problems with this one:
1). When it says "the following", that usually means there's a list after the question,
from which you're supposed to choose the correct one. Like what you call a "multiple
choice" question. In order for us to play the game with you, you were supposed to
give us the list of choices, but you didn't.
2). We could be wrong, but we have a hunch that you're going for "voltmeter". If that's
the answer, then the question is poorly worded. The voltmeter shows the difference in
electrical potential between two points, not charge. We also have a hunch that this
question comes from a high school Physics class, and if that's true, then it's a lot more
important to understand the difference between 'charge' and 'potential' than to know
the name of the meter. In other words, this question is more important to you than the
answer to it is, and the question needed to be written better than it was.
In the context of electromagnetic theory, the fundamental differences between Gaussian units and SI units lie in the way they define the basic electromagnetic quantities such as electric charge, electric field, magnetic field, and current. Gaussian units are based on the electrostatic unit of charge, while SI units are based on the coulomb. This leads to differences in the equations and constants used in electromagnetic theory calculations.
Then one point is 20 units away from the other.
Energy
zero Half the distance between them would be 4 units; so 3 units from P would not be close enough to Q to be equidistant.
The distance between the points of (4, 3) and (0, 3) is 4 units
six units
The distance between the points of (4, 3) and (0, 3) is 4 units
The distance between these two points is 23.
Voltage or electric potential tension measured in units of electric potential: volts, or joules per coulomb) is the electric energy charge difference of electric potential energy transported between two points.
Length is the distance - in given units - between two points on a line.
Points: (-6, 1) and (-2, -2) Distance: 5 units
Points: (3, -4) and (3, 3) Distance: 7 units