There are hundreds of magnet materials used to generate and charge electric currents. Magnetic materials are usually made up of metal atoms; they can be either positively or negatively charged. When charged with negative voltage, a magnetic material changes in magnetic field strength which can be measured by a magnetic field compass. Some of the most common methods of detecting electric current in a magnet are as follows:
Magnetometer: An electronic magnetometer contains a magnetic field at its positive end and generates a small magnetic current that is recorded on a tape recorder or electronic circuit board. These current measurements are sensitive and repeatable and are often used in monitoring and analyzing the strength of a magnet.
Magnetometer Test Method: The magnetometer is connected to a circuit whose positive voltage, measured from a magnet’s surface, is connected directly to the circuit’s negative end, and the magnetometer produces an electrical signal with a frequency of 1/1000 of a meter. Then, the voltage for the recorded signal is increased to about 1/1000 of the recorded frequency and a second wire is connected between the magnetometer’s positive and negative electrodes. The current in the wire is added to the current in the recorder, thus increasing the signal with frequency. The recorded signal is then recorded on a tape.
Magnetometer Test Method – Bipolar: A magnetometer with a magnetic field in the positive and negative directions can be constructed by passing a magnet in a bipolar or non Bipolar orientation at right angles to a wire with a positive and negative voltage. While it is possible to record different magnetic fields under the same condition, there are times when it is not possible. The signal from the magnetometer will be recorded as a sinusoidal wave, with the maximum power resulting when the two negative ends of the wire are connected to a high current source (such as batteries or an electronic device). The measured power level is the peak or maximum signal at each point of the measured voltage and can be used to determine the actual current flow through the magnet.
Magnetometer Test Method – Double Coil: Magnetic fields in parallel in a twin coil system produce a continuous wave with the best performance in detecting small current increases. With a good twin coil system, the current is measured at an interval of one microsecond. It takes about 1-second to record each waveform. There is a large potential difference (which affects measurement stability) so the current can be detected at the top end of the detector.
The magnetometer is the most commonly used test tool while performing
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