SSC JE Electrical Engineering 2014 Set 2 Paper

Question : 128 of 200

Marks: +1, -0

The B - H curve is used to find the mmf of this section of the magnetic circuit. The section is :

vacuum
iron part
air gap
both (b) and (c)

Solution:

B-H curve is use to find the mmf of iron Part of the Magnetic circuit. BH Curve is a Plot of the Magnetic flux Density

(B↖{→})

riversus the Magnetic field strength

( H ↖{→})

. This is an importent machine.
The B-H curve is the curve characteristic of magnetic property of a material or element or alloy. It tells you how the Material Responds to an external magnetic field and is a critical piece of information when designing Magnetic circuit.

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