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.

Question

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.

Philoid · Accepted Answer

1. take out the tray from the match box

2. place a small magnetic compass inside the tray.

3. Take an electric wire and wound it around the tray many times.

4. Now connect the one free end of the wire to one terminal of battery

5. Now take another wire and connect its one end to other terminal of the battery and leave the other end free.

Testing:

For testing any solution, dip the two free ends of wire in the given solution. If the solution is a good conductor of electricity, there is a deflection in the magnetic needle of the compass otherwise no deflection and the given solution is a poor conductor of electricity.