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Question

Which of the following is used to detect electric current?

A
Tester
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B
LED
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C
Compass needle
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D
All of the above
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Solution

The correct option is C All of the above
Tester, LED and compass needle, all of them are used to detect electric current.Because on passing of electric current all these three respond by glowing in case of tester or led and by showing delfection in case of compass needle.

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