Maximum Power Transfer Theory

If a source circuit is represented as an ideal voltage (VS) in series with an internal resistance (RS), then maximum power is transferred to the load when the load resistor (RL) is equal to the internal resistance of the source. The source circuit could be a non-ideal...

Magnetic Circuits

Concepts Properties of Magnetic Fields The Earth’s Magnetic Field Types of Magnetic Material Magnetic Flux Magnetic Flux Density Magnetomotive Force Magnetic Field Strength (or Magnetising Force) Permeability B-H Curve (Magnetisation curve) Reluctance Basic...

Voltmeter

A voltmeter is an electronic test instrument which measures the electrical potential difference or voltage across the input terminals. A voltmeter must be connected in parallel with the circuit being tested, unlike an ammeter which is connected in series. Voltmeters...

Basic Electrical Concepts

Basic Electrical Terms and Units Current Resistance Voltage Power Comsumed in a Resistor Measuring Instruments Ammeter Ohmmeter Voltmeter Related Topics Terms and Units SI Prefixes Electrical Electrical and Electronic Weblinks

Ammeter

An ammeter is a device which measures the flow of electrical current. The current may be either continuous (DC) or alternating (AC) and is measured in amperes (A), microamps (mA) or milliamps (µA). Unlike a voltmeter, an ammeter is normally inserted in series...