# Electric Voltage

on . Posted in Electrical Engineering

Electric voltage V or E, also known as electric potential difference, is the measure of the electric potential energy per unit charge that is required to move a charge from one point to another in an electric field.  A unit of electrical pressure.  One volt is the amount of pressure that will cause one ampere of current in one ohm of resistance.

### Electric Voltage Index

In simple terms, voltage is the force that drives the electric current through a conductor.  It is similar to the pressure that drives water through a pipe.  The greater the voltage, the more electric charge will flow through a circuit.  Voltage can be calculated using Ohm's Law, which relates voltage, current, and resistance in an electrical circuit.

### Electric Voltage formula

$$V = I \; R$$     (Electric Voltage)

$$I = V \;/\; R$$

$$R = V \;/\; I$$

Symbol English Metric
$$V$$ = voltage $$V$$ $$kg-m^2 \;/\; s^3-A$$
$$I$$ = current $$I$$ $$C \;/\; s$$
$$R$$ = resistance $$\Omega$$ $$kg-m^2 \;/\; s^3-A^2$$

### Electric Voltage formula

$$V = P \;/\; I$$     (Electric Voltage)

$$P = V \; I$$

$$I = P \;/\; V$$

Symbol English Metric
$$V$$ = voltage $$V$$ $$kg-m^2 \;/\; s^3-A$$
$$I$$ = current $$I$$ $$C \;/\; s$$
$$P$$ = power $$P$$ $$kg-m^2 \;/\; s^3$$

### Electric Voltage formula

$$V = \sqrt{ P \; R }$$     (Electric Voltage)

$$P = V^2 \;/\; R$$

$$R = V^2 \;/\; P$$

Symbol English Metric
$$V$$ = voltage $$V$$ $$kg-m^2 \;/\; s^3-A$$
$$P$$ = power $$P$$ $$kg-m^2 \;/\; s^3$$
$$R$$ = resistance $$\Omega$$ $$kg-m^2 \;/\; s^3-A^2$$

### Voltage in Series formula

The total voltage of several voltage sources or drops in series.

$$V_t = V_1 + V_2 + V_3 +\; ...$$
Symbol English Metric
$$V_t$$ = voltage total source or drop $$V$$ $$kg-m^2\;/\;s^3-A$$
$$V_1, V_2, V_3$$ = voltage source or drop $$V$$ $$kg-m^2\;/\;s^3-A$$

### Voltage in Parallel formula

The voltage sources or drops in parallel having equal voltages.

$$V_t = V_1 = V_2 = V_3 =\; ...$$
Symbol English Metric
$$V_t$$ = voltage total source or drop $$V$$ $$kg-m^2\;/\;s^3-A$$
$$V_1, V_2, V_3$$ = voltage source or drop $$V$$ $$kg-m^2\;/\;s^3-A$$