Question

How is potential difference measured?

Answer 1

Explanation: An device called a "voltmeter" is used to measure voltage or the potential difference between any two points in a circuit. A voltmeter must be connected in parallel with the component whose voltage you want to measure in order to measure voltage (potential difference).

1. The voltage drop across a single component or supply can be measured using a voltmeter, as well as the total voltage drop across two or more locations or components within a circuit.
2. The "permanent-magnetic moving-coil" (PMMC) meter, commonly known as a D'Arsonval movement, is the most fundamental type of DC analogue voltmeter.
3. A unit of positive electric charge must be moved from one spot to another in order to create a potential difference.
4. The potential difference between the two sites can be calculated by the formula $V=IR$.

To calculate the potential difference between two points:

1. Establish the field's strength, $E$, as well as the separation between the two spots, $d$.
2. Calculate the potential difference between the two sites using the formula $\Delta V=Ed$.
3. Divide the resistance present in the circuit by the current flow rate. The potential difference, expressed in volts, is the outcome of the multiplication. Ohm's Law, $V=IR$, is the name of this equation.

Where $V=$Voltage, $I=$Current, and $R=$Resistance.