Analog Galvanometer, Voltmeter, and Ammeter Concepts

This set of flashcards covers key concepts related to the analog galvanometer, voltmeter, and ammeter, including definitions of important terms and laws relevant to electrical measurements.

Galvanometer

An instrument for detecting and measuring electric current.

Ohm's Law

A law stating that the current through a conductor between two points is directly proportional to the voltage across the two points.

Internal Resistance (r)

The resistance within a galvanometer that affects the current readings.

Full-scale deflection (Ig)

The maximum current that results in the full-scale reading on the galvanometer.

Variable Resistor

A resistor whose resistance can be adjusted to vary the current in a circuit.

Voltmeter

An instrument used to measure the potential difference between two points in an electric circuit.

Multiplier Resistance (M)

Resistance added to a voltmeter to allow it to measure higher voltages.

Ammeter

An instrument used to measure electric current in a circuit.

Shunt Resistance

A low resistance connected in parallel with an ammeter to allow part of the current to bypass the meter.

Proportionality in Values

The relationship where values increase or decrease together in a constant ratio.