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Theory In the conventional techniques of tracing the B-H loop, one has to wind a primary and a secondary coil on the specimen and experiment with it.
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Universal B-H Curve Tracer Objective:
Theory In the conventional techniques of tracing the B-H loop, one has to wind a primary and a secondary coil on the specimen and experiment with it. This method is not convenient for a quick study of the shapes of B-H loops of different materials. The present technique can be used to study B-H loop by simply inserting the specimen in a magnetizing coil. It makes use of a specially designed integrated circuit probe to measure the flux density B. The current flowing through the magnetizing coil develops a potential difference across the resistance R which deflects the beam in the X-direction. The deflection is proportional to the magnetic field H which is given by:
 where N is the no. of turns of the coil, R the resistance in series with the coil i.e. resistance between terminals G & H and L is the coil length in meters. VX is the voltage applied to the X-input of the CRO. The probe has a sensitivity of 5 mV per Gauss. Hence
 where Vy is the voltage applied to the Y input of the CRO
Universal B-H Curve Tracer consists of the following parts:
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