You are provided a magnetic compass,an empty match box,a battery of two cells and connecting wires.Using these objects how will you make a tester for the testing of an electric circuit?Draw the diagram and explain.

1. The circuit formed is as shown below:

The connecting wire is wrapped around the match box that contains the magnetic compass. When the current from battery is passing, there is a magnetic field of current that is formed, which interacts with the magnetic compass and it shows deflection.

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process by which 
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somebody pls answer.....i need d answer by tomorrow...very urgent
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