Notes on Measuring Voltage in a Circuit

Voltmeter

  • Purpose: Measures voltage in a circuit.
  • Definition of Voltage:
    • The energy lost (voltage drop) or gained (voltage gain) between two points.
  • SI Unit: Volt (V).
  • Connection:
    • Connected in PARALLEL to the devices in a circuit.
    • Negative side connects to the negative side of the circuit.
  • Symbol: Represented by a specific symbol in circuit diagrams.

Example

  • (An example symbol or illustration is suggested here but not provided in the text.)