voltmeter
Definition
Noun: A device used for measuring the difference in electric potential (voltage) between two points in an electric circuit.
Usage
A voltmeter is an essential instrument in electrical engineering and electronics. It is always connected in parallel across the component or points where the voltage needs to be measured. This is a fundamental tool for diagnostics, circuit design, and maintenance.
Examples
Basic Usage:
- To check the battery, he used a voltmeter.
- The technician connected the voltmeter across the resistor to measure the voltage drop.
Technical Context:
- A digital voltmeter provides a more precise reading than an analog one.
- Always ensure the voltmeter is set to the correct voltage range before taking a measurement.
Advanced Usage
- Null Voltmeter: A highly sensitive voltmeter used in potentiometric measurements to detect a condition of zero voltage, indicating a balanced circuit.
- Electrostatic Voltmeter: A type of voltmeter that uses the force of attraction between charged plates to measure voltage, suitable for very high voltages with minimal current draw.
Variants and Related Words
- Multimeter (n): A multifunctional instrument that can measure voltage, current, and resistance. A voltmeter is one of its core functions.
- Potentiometer (n): An instrument for measuring an unknown voltage by comparing it with a known standard voltage. It is related in function but operates on a null-balance principle.
Synonyms
- Potential Difference Meter: A more descriptive technical synonym.
- Voltage Meter: A common alternative name.
Related Phrases
- To read the voltage: The action performed using a voltmeter.
- She read the voltage on the display of the voltmeter.
- Voltmeter leads: The probes or wires used to connect the voltmeter to a circuit.
- Connect the red voltmeter lead to the positive terminal.
Noun
-
meter that measures the potential difference between two points
Khám phá thêm
Các từ liên quan
Từ chứa "voltmeter"
Từ có nhắc đến "voltmeter"
