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You are provided with a magnetic compass, an empty matchbox, a battery of two cells and connecting wires. Using these objects, how will you make a tester for testing an electric circuit? Draw the necessary circuit diagram and explain.
Remove the plate from the of a used matchbox. Wrap an electric cable around the tray several times. Insert a tiny compass needle inside. one of the wire's loose ends to a battery terminal. Allow the other end to be loose.
Connect another section of to the other battery terminal. Temporarily connect the loose ends of two wires.
The magnetic impact of the current causes the compass to deflect. Your tester with separate wire ends is now complete.
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