Question

Write activity 14.3 of class 8 science ncert textbook and
plz give me​

Answer 1

Answer:

what is the aim of activity

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Answer 2

Take the tray from inside a discarded matchbox. Wrap an electric wire a few times around the tray. Place a small compass needle inside it. Now connect one free end of the wire to the terminal of a battery. Leave the other end free. Take another piece of wire and connect it to the other terminal of the battery

Another tester
Join the free ends of two wires momentarily. The compass needle should show deflection. Your tester with two free ends of the wire is ready.
Now repeat Activity 14.2 using this tester. Do you find a deflection in the compass needle the moment you dip the free ends of the tester in lemon juice?