## How BH curve is determined for a ring specimen?

The value of flux density corresponding to this H can be calculated by dividing the flux by the area of the specimen. The above procedure is repeated for various values of H up to the maximum testing point. The B-H curve may be plotted from the measured values of B corresponding to the various values of H.

## What is a BH loop?

A hysteresis loop shows the relationship between the induced magnetic flux density B and the magnetizing force H. It is often referred to as the B-H loop.

**What is BH curve for magnetic material?**

The B-H curve or magnetisation curve is the graph plotted between magnetic flux density (B) and magnetising force (H). The B-H curve indicates the manner in which the magnetic flux density varies with the change in magnetising force. The following figure shows the general shape of B-H curve of a magnetic material.

**What is the value of BH?**

At a place on earth the value of BH is 0.1732 oersted and angle of dip is 30°.

### What is the significance of the area of a BH loop?

The area of hysteresis gives the amount of energy lost in applying the external magnetic field. Large the area, more energy loss. Lesser the area, least energy lost.

### What is BV and BH?

Horizontal and vertical components of earth’s magnetic field are Bh and Bv, respectively. We know that Bh=B cosδ where B is the earth’s total magnetic field and δ is the angle of dip. Also, Bv=Bsinδ

**What is BH at a place?**

answer: At a place Be is the earth’s magnetic field and BH is its horizontal component.

**How do you find the area of a BH loop?**

Hysteresis loop in first quadrant will be obtained. Go to gadgets -integrate, from the pop up window click on baseline – data set-Add plot 2. Adjust the width of the box which appears now, Area of the selected region between the two curves will appear on screen.

## How do you plot the B-H curve?

The B-H curve may be plotted from the measured values of B corresponding to the various values of H. The circuit for this test is shown in Fig. The magnetizing winding is supplied through a potential divider having a large number of tapping.

## What is a hysteresis loop?

The absence of re-traceability of the magnetization curve (H) is the property called as hysteresis and it is associated with the presence of magnetic domains in the material. A hysteresis loop shows the relationship between the induced magnetic flux density (B) and the magnetizing force (H). This is the reason it is also called as the B-H curve.

**How to plot the B-H curve of magnetizing winding?**

The B-H curve may be plotted from the measured values of B corresponding to the various values of H. Step by step method The circuit for this test is shown in Fig. The magnetizing winding is supplied through a potential divider having a large number of tapping.

**How are the ‘B’ and ‘H’ signals obtained?**

The retrieved ‘B’ and ‘H’ signals are processed offline to obtain the results. The lamination sheet has been tested for frequencies in the range [0.1-150 Hz] and flux density levels up to 1.5 T. The obtained results depict characteristics hysteresis curves and measured loss figures.