Definition of voltage

Definition:
Formal Definition: 
Voltage is defined as the difference in electric potential between two points. It represents the work needed to move a charge from one point to another.
-Formula: 

Voltage (V) is calculated using the formula \( V = W/Q \), where \( W \) is the work done (in joules) to move the charge \( Q \) (in coulombs).

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Voltage, also known as electric potential difference, electric pressure, or electric tension, is a measure of the electric potential energy per unit charge between two points in an electric circuit. It is what drives electric current through a circuit.

Definition:

Formal Definition: 

Voltage is defined as the difference in electric potential between two points. It represents the work needed to move a charge from one point to another.

Formula: 

Voltage (V) is calculated using the formula \( V = W/Q \), where \( W \) is the work done (in joules) to move the charge \( Q \) (in coulombs).

Symbols and Units:

Symbol for Voltage: 

The standard symbol for voltage is (V)

 Common Units and Notations Related to Voltage:

-Millivolt (mV):

 One thousandth of a volt (\(1 mV = 10^{-3}\) V).

Kilovolt (kV):

 One thousand volts (\(1 kV = 10^3\) V).

-Microvolt (μV).

 One millionth of a volt (\(1 μV = 10^{-6}\) 

Ohm's Law.

 Describes the relationship between voltage (V), current (I), and resistance (R): \( V = I \times R \).

Electric Power (P): 

The power in an electric circuit is the product of the voltage and the current: \( P = V \times I \).

 Practical Examples:

Household Voltage:

In many countries, standard household voltage is either 120V or 230V.

Battery Voltage.

 Common household batteries have voltages such as 1.5V (AA, AAA) or 9V (rectangular batteries).

High Voltage: 

Used in power transmission to reduce energy losses over long distances, often measured in kilovolts (kV).

 Voltage Sources:

Batteries:

 Provide a constant voltage supply for portable devices.

Generators: 

Convert mechanical energy into electrical energy, providing voltage for electrical systems.

-Power Supplies: 

Convert and regulate voltage for various electronic devices.

 Safety Considerations:

Low Voltage:

 Generally considered safer and is used in many household and electronic applications.

High Voltage: 

Can be dangerous and requires special precautions and insulation to prevent electric shocks and accidents.