In ferromagnetic materials the small regions that act like tiny magnets are called
A)
conductors.
B)
domains.
C)
iron filings.
D)
spins.
E)
ferromagnets.
Question 2
Which of the solenoids described below has the greatest magnetic field along its axis?
A)
a solenoid of length L, with N turns and a current I
B)
a solenoid of length L, with N/2 turns and a current I
C)
a solenoid of length L/2, with N/2 turns and a current I
D)
a solenoid of length 2L, with N turns and a current I/2
E)
a solenoid of length 2L, with 2N turns and a current 2I
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