A weak current can be detected by replacing an electric bulb in a electric tester with (a) LED (b) a coil wound over a compass needle (c) both (a) and (b) (d) none of these
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Answer:
Hence, a LED bulb or a magnetic compass indicates the presence of a weak current in the circuit.
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A weak current can be detected by replacing an electric bulb in a electric tester with (a) LED
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