In many of the activities in this chapter, we have used a tester made up of LED. Can we avoid LED and use something else as a tester? Magnetic compass needle could be an alternative tester. We know that when we take a current carrying wire near magnetic compass needle, it shows deflection. Use this property to make a tester of magnetic compass needle. You may refer to the following figure.
Yes we can avoid LED and use something else as a tester. Magnetic compass needle can be used as an alternative tester.
i. If a magnetic needle is kept near a wire that conducts electricity, the magnetic compass shows deflection.
i. Even if weak current flows, the compass shows deflection.
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