Question on: JAMB Physics - 2015
The device in which one circuit controls another, especially if the current in the second circuit is large or dangerous is known as
A
Electromagnetic devices
B
Magnetic relay device
C
None at all
D
Sextant
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Correct Option: B
Magnetic relay device :is the device that controls a circuit (i.e one circuit )if a current in the second circuit is large or dangerous
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