You are provided with 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 testing an electric circuit? Draw the necessary circuit diagram and explain.

You are provided with a magnetic compass, an empty match box, a batter

1.	You are provided with 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 testing an electric circuit? Draw the necessary circuit diagram and explain.
Answer» a tester of magnetic compass needle, take a matchbox. wrap an electrical wire a few times around the matchbox. place a small compass needle inside it. now connect one FREE END of the wire to a TERMINAL of two cell battery. from the other terminal of battery connect another wire. now tester with two free ends of wire is ready. Principle of working: when current flows in a wire, a compass needle gets deflected.in other WORDS current CARRYING wire produces magnetic field around it.