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Voltage and Current Instruments
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Voltmeter
A device used to measure the potential difference between two points in an electric circuit.
Ammeter
An instrument used to measure the electric current in a circuit.
Ohmmeter
A device used to measure the resistance of a component or circuit.
Multimeter
A multi-function instrument designed to measure voltage, current, and resistance, among other parameters.
Oscilloscope
An instrument that graphically displays varying signal voltages, usually as a two-dimensional plot of one or more signals as a function of time.
Wattmeter
A device used to measure the power (in watts) in an electric circuit through the product of current and voltage.
Galvanometer
An analog instrument for detecting and measuring small electric currents by deflection of a moving coil in a magnetic field.
Clamp Meter
An electrical tester that combines a basic digital multimeter with a current sensor for high current measurements in a wire without the need for disconnection.
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