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What is the main advantage of temporary magnets?

A. The magnetic flux can be changed.

B. Hysteresis can be decreased.

C. Magnetic materials can be used.

D. Abundance of ferromagnetic material that can be temporarily magnetized.

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  3. What revolves about the positive nucleus in a definite orbit?
  4. Electric lines of force leave or enter the charge surface at an angle of
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  13. The property of magnetic materials of retaining magnetism after withdrawal of the magnetizing force…
  14. Cobalt is an example of a ______ material.
  15. Flux density is measured in
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  17. What is the maximum number of electrons that can be accommodated in the last orbit of an atom?
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  22. One electron volt (1 eV) is equivalent to _____ joules
  23. Which of the following magnetic materials can be easily magnetized in both direction?
  24. The magnetic potential in a magnetic circuit can be measured in terms of
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  26. The emf induced in a coil due to the change of its own flux linked with it is called
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