Which of the following can be used as a tester to detect a weak current in a circuit?

Compass needle only

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Both LED and compass needle

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Electric bulb

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LED only

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Solution

The correct option is B
Both LED and compass needle

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Which of the following can be used as a tester to detect a weak current in a circuit?

The correct option is B Both LED and ​compass needle

The correct option is B
Both LED and compass needle