lets think ones more powerful than the other......12<18....only my opinion
12 volts is less of power than 18 volts drill
The unit for electric potential difference is the volt (V).
potential difference.
you can just check it properly... (on every battery volt is surely given...)
Voltage is the measure of the electric potential difference between two points in an electric circuit. It is the amount of potential energy per unit charge available to move electrons from one point to another. Voltage is measured in units called volts, symbolized by the letter V.
E=IR.....So, R=E/I........ E volts diveded by I amps= resistance.... You do the math...
The 'volt' was named after Alessandro Volta. In electricity, a volt is the unit of electric potential difference. Volta's greatest invention was the electric battery.
I don't think such a unit is used, or would make much sense, in physics. That sounds like the description of voltage - unit volt. However, the volt is not really a difference in electric charge, but rather, of electric potential. It can be understood as potential energy related to electric fields: if there is an electric potential between two points, it requires a certain amount of energy to move a unit charge from one point to the other. Thus, the unit volt is equivalent to joules / coulomb.
Absolutely not! It is a 14 volt drill. Use a 16 or 18 volt battery will destroy the drill in short order. It will run but not for long.
Aroni
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.AnswerFirst 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 volt, which is equivalent to a coulomb per second.
Because nothing has to pass through the meter. The voltmeter is only measuring the DIFFERENCE in electric potential between two points.