|Hall probe together with either CRO or voltmeter or flux-meter
(i) the probe is placed perpendicularly to the field so as to obtain the maximum reading AND (ii) the probe needs to be calibrated first.
|Search coil + CRO
E.g. A coil generates a changing magnetic field using signal generator. The changing magnetic field is measured using a perpendicular search coil and CRO.
|A coil of copper wire. Can be used to measure changing magnetic field. The induced voltage can be read from a CRO.|
The actual coil
The field pattern is constant inside the coil
|Consists of two large flat circular coils placed close to each other. When a common current flows through both coils in the same direction, a constant magnetic field is produced in the space between the coils.|
|Solenoid||Provides a const B field in the central region of the coil.|