What are the two classes of magnets?
A) Permanent and temporary
B) Temporary and electromagnet
C) Copper and nickel
D) Permanent and electromagnet
Correct Answer:
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Q8: A(n) _ needs current from an external
Q9: A _ is a switch with contacts
Q10: _ field lines are unaffected by nonmagnetic
Q11: What are the base units for permeability?
A)
Q12: What maintains the strength of the permanent
Q14: The wire wrapped in a form of
Q15: What is the device that is basically
Q16: The point at which a magnetic material
Q17: In terms of molecular structure, iron atoms
Q18: What device concentrates the magnetic field of
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