A multimeter is an essential tool used to measure various electrical properties in circuits and devices. It combines several functions into one device, making it versatile and indispensable for both professionals and hobbyists in fields like electronics, electrical engineering, and troubleshooting. A standard multimeter can measure:

1. Voltage (V): The electrical potential difference between two points in a circuit. It can be measured in either:

   • AC Voltage (Alternating Current): Typically for household electrical outlets.
   • DC Voltage (Direct Current): Common in batteries and low-voltage devices.

2. Current (A): The flow of electric charge. It can be measured in:

   • AC Current: Used for alternating current circuits.
   • DC Current: For direct current circuits.

3. Resistance (Ω): The opposition to the flow of electric current in a circuit. This is useful for checking continuity in wires or components.

Some advanced multimeters also include additional features, such as:

• Capacitance: Measures the capacity of capacitors.
• Diode Testing: Used to check the functionality of diodes.
• Frequency Measurement: To measure the frequency of AC signals.
• Temperature Measurement: Some multimeters have temperature probes to measure temperature in circuits.

Types of Multimeters:

1. Analog Multimeter: Uses a moving needle to display readings on a scale. Less common now but still used for certain applications where sensitivity and smooth analog readings are required.
2. Digital Multimeter (DMM): Displays readings in numerical digits on an LCD screen. It's the most commonly used type due to its accuracy and ease of reading.