Alternating current field measurement (ACFM) is an electromagnetic technique for non-destructive testing detection and sizing of surface breaking discontinuities...

resulting Lorentz force remains constant. Eddy current Nondestructive testing Alternating current field measurement Cover Meter Metal detector Skin effect Ivor...

electrical engineering, current sensing is any one of several techniques used to measure electric current. The measurement of current ranges from picoamps...

machines of the dynamo type. Alternating current can also be converted to direct current through use of a rectifier. Direct current may flow in a conductor...

EMF measurements are measurements of ambient (surrounding) electromagnetic fields that are performed using particular sensors or probes, such as EMF meters...

A current transformer (CT) is a type of transformer that reduces or multiplies alternating current (AC), producing a current in its secondary which is...

as "EMI") Alternating current field measurement (ACFM) Alternating current potential drop measurement (ACPD) Barkhausen testing Direct current potential...

through alternating measurement chambers. Permanent magnets in the rotating gears can transmit a signal to an electric reed switch or current transducer...

used to measure the current in a circuit. Electric currents are measured in amperes (A), hence the name. For direct measurement, the ammeter is connected...

electromagnetism, an eddy current (also called Foucault's current) is a loop of electric current induced within conductors by a changing magnetic field in the conductor...

to allow clamping around an electrical conductor. This allows measurement of the current in a conductor without the need to make physical contact with...

and gather at surface-breaking cracks. Alternating current field measurement (ACFM) is similar to eddy current applied to steel. Its most common application...

are: Voltage, alternating and direct, in volts. Current, alternating and direct, in amperes. The frequency range for which AC measurements are accurate...

induction motor that ran on alternating current. The motor used polyphase current, which generated a rotating magnetic field to turn the motor (a principle...

etc.) define high voltage as above 1000 V for alternating current, and at least 1500 V for direct current. In the United States, the American National...

the voltage measurements. As source, the direct current or low frequency alternating current is used. The interpretation of the measurements can be performed...

sec.) and currents as small as twenty micro-amperes can be readily measured by it . It is equally correct on continuous and alternating currents. It can...

is the oscillation rate of an alternating electric current or voltage or of a magnetic, electric or electromagnetic field or mechanical system in the frequency...

wire rotating in a magnetic field produces a current which changes direction with each 180° rotation, an alternating current (AC). However many early uses...

Walter Rogowski, is an electrical device for measuring alternating current (AC) or high-speed current pulses. It sometimes consists of a helical coil of wire...

showing alternating stripes. Scientific understanding of the evolution of the magnetic field of Mars is based on the combination of satellite measurements and...

needed]. The electrodes are usually made of platinum metal. An alternating current is applied to the outer pair of the electrodes. The potential between...

Direct current from Alternating Currents - 1889 October 22 - Superiority of alternating currents discussed; Delineates machines to convert alternating currents...

and electric heaters. In alternating current (AC) circuits the direction of the voltage periodically reverses, but the current always flows from the higher...

Moving-coil instruments with a permanent-magnet field respond only to direct current. Measurement of AC voltage requires a rectifier in the circuit...

can be computed using Kirchhoff's circuit laws. When talking about alternating current (AC) there is a difference between instantaneous voltage and average...

field lags. Since the velocity of propagation is very high – about 300,000 kilometers per second – the wave of an alternating or oscillating current,...

difficulty in accurate measurement of the alternating current, rather than voltage, and the relatively little need for low-power measurements. The specification...

In electrical engineering, impedance is the opposition to alternating current presented by the combined effect of resistance and reactance in a circuit...

is used in alternating current (AC) applications such as transformers and inductors, the changing magnetic field induces large eddy currents circulating...