Physics
JAMB 2015
The device in which one circuit controls another, especially if the current in the second circuit is large or dangerous is known as
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A.
Electromagnetic devices
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B.
Magnetic relay device
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C.
None at all
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D.
Sextant
Correct Answer: Option B
Explanation
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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