Question

a) Explain how a magnetic needle and a bulb help in testing the conduction of electricity
by different materials. Which of the two is more effective in testing the conduction of
electricity by liquids? Give a reason for your answer​

Answer 1

Explanation:

Magnetic needle shows deflection because of conduction of electricity through the solution. We know that when electric current passes through a conductor, the conductor behaves like a magnet. This is called magnetic effect of electric current.