A simple electric doorbell probably uses to ring the bell.
A) an electromagnet
B) transistor
C) a permanent magnet
D) a DPDT switch
Correct Answer:
Verified
Q49: The movable part of the relay is
Q50: If the number of turns of wire
Q51: The principal difference between a solenoid and
Q52: Increasing the speed at which a magnet
Q53: Magnetic lines that are close to each
Q55: Like magnetic poles .
A)have no effect on
Q56: A relay is a device that .
A)has
Q57: The movable part of the solenoid is
Q58: Hysteresis is a characteristic of magnetic materials
Q59: The electromagnet cannot be further magnetized.
A)open
B)capacitive
C)saturated
D)shorted
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