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Explain hysteresis loop

Which of the following is represented by the area enclosed by a hysteresis loop (B - H curve)?

A rectangular loop carrying a current i is placed in a uniform magnetic field B. The area enclosed by the loop is A. If there are n turns in the loop, the torque acting on the loop is given by

A rectangular loop carrying a current i is placed in a uniform magnetic field B. The area enclosed by the loop is A. If there are n turns in the loop, the torque acting on the loop is given by

Consider the following statements (i) for a permanent magnet the area of a hysteresis loop is allowed to be large (ii) Coercivity o the material in permanent magnets should be small. Which of the following statements is/are true?

If the areas under the I-H hysteresis loop and B_H hysteresis loop are denoted by A_(1) and A_(2) , then

The area of hysteresis loop of a magnetic material A is larger than of another magnetic materialB. Which of the two materials is better suited for use as the core of an electromagnet?

The area of B-H hysteresis curve is an indication of: