Why is voltage considered to be the electric potential?
Voltage is just the name. Electric potential is a synonym. These are just customary terms, without any deeper reference.
No, voltage is synonymous with 'potential difference', not potential.
What is the voltage at the location of a 0.0001-Coulomb charge that has an electric potential energy of 0.5 joules?
Voltage, along with electric pressure, electric tension, and electrical potential difference is measured in units of electric potential. This can be joules per coulomb or volts. Answer First of all, there is no such thing as a 'voltage difference'. Voltage is already a 'difference', as it is an alternative name for 'potential difference'! 'Voltage difference', therefore, would mean 'potential difference difference', which makes no sense! The unit for potential and potential difference (voltage) is the…
What is the voltage at the location of a 0.0001-c charge that has an electric potential energy of 05j?
If you use 'polarity' in the sense of electric charge, no, it does not. Voltage is simply another word for potential difference and potential difference doesn't have an electric charge. Potential, on the other hand does, but its charge polarity depends on from where it is being measured. If you use 'polarity' in the sense of direction, then, yes, it does. You can allocate direction to a voltage.