In many of the activities, we have used a tester made up of LED. Can weavoid LED and use something else as a tester?
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Answer:
Explanation:
Yes, one can avoid the LED and use an alternative as a tester. Magnetic compass needle can be used as an alternative tester. A magnetic compass is the most frequent instrument used to determine the direction. Magnetic compass can be used when -
a. If the magnetic needle is kept near a wire conducting electricity, then the magnetic compass shows deflection.
b. Even if a weak current flows across the wires, then also the compass shows a deflection.
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