Energy needed to magnetize and demagnetize is represented by _________________?
Correct answer: B. Hysteresis loop area
- A. Hysteresis curve
- B. Hysteresis loop area
- C. Hysteresis loop
- D. Straight line
Explanation
The area enclosed by a hysteresis loop represents the energy lost per unit volume in one complete magnetisation cycle, so it measures the energy required through heating. The likely alternative is the whole hysteresis curve, but the energy information specifically comes from the enclosed loop area.
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About Magnetic Flux Density
Magnetic flux density measures the magnetic force acting on a current carrying conductor or moving charge in a magnetic field. Work includes the relations B equals F divided by IL and F equals qvB, the tesla as its SI unit, field direction and the distinction between flux density and magnetic flux.
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