Which of the following device would you prefer to detect minute flow of current through an electrolyte?

Bulb

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Compass needle

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Tester

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Light emitting diode

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Solution

The correct option is D Light emitting diode
LED (Light-emitting diode) requires the least amount of current. Hence, it can be used to detect even smaller values of current.

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Similar questions

The device which can be used to detect very small current flowing in an electric circuit is :
(a) LEAD
(b) dB
(c) MCB
(d) LED

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