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A digital clamp meter A multimeter with built-in clamp. Pushing the large button at the bottom opens the lower jaw of the clamp, allowing the clamp to be placed around a conductor. An electrical meter with integral AC current clamp is known as a clamp meter, clamp-on ammeter, tong tester, or colloquially as an amp clamp.
Demonstration model of a moving iron ammeter. As the current through the coil increases, the plunger is drawn further into the coil and the pointer deflects to the right. An ammeter (abbreviation of ampere meter) is an instrument used to measure the current in a circuit. Electric currents are measured in amperes (A), hence the name. For direct ...
Clamp meters clamp around a conductor carrying a current to measure without the need to connect the meter in series with the circuit, or make metallic contact at all. Those for AC measurement use the transformer principle; clamp-on meters to measure small current or direct current require more exotic sensors, such as; hall effect based systems ...
Obsolete name for an ammeter; now an instrument for measuring fluid viscosity. rheostat Obsolete name for a two terminal variable resistor, usually with a rotating shaft to allow manual or motor driven adjustment. right-hand rule A mnemonic device for remembering the definitions of the directions of current and magnetic field in generators. ripple
Current clamp. An electrical transformer in the form of a split ring, which may be opened and clamped around an electrical conductor. The clamp contains one winding of the transformer, and the conductor provides the other. Small clamps are used for measurements, while large clamps are used for signal injection, e.g. for EMC susceptibility testing.
This is a list of auto parts, which are manufactured components of automobiles. This list reflects both fossil-fueled cars (using internal combustion engines) and electric vehicles; the list is not exhaustive. Many of these parts are also used on other motor vehicles such as trucks and buses.