A basic law of physics states that whenever an electric current flows through a conductor, a magnetic field is formed around the conductor.
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Q7: When a coil is wound around a
Q8: A speaker uses three separate magnets. One
Q9: Magnetic lines of flux repel each other
Q10: There are actually only three substances that
Q11: Energy is required to create a magnetic
Q13: The angular difference between true north and
Q14: For a magnet with an area of
Q15: When an object is to be demagnetized,
Q16: _ will demagnetize an object.
A) Freezing
B) Rubbing
C)
Q17: Viability is a measure of a material's
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