Question

magnetic needle can be used to detect the electric conductivity. why​

Answer 1

$\large\fbox\red{Answer}$

We need a magnetic compass to test the conduction of electric current because the magnetic compass will get deflected even if there is a small value of current. Sometimes the bulb does not glow on passing electric current. So, in the case of a small current, we need a magnetic compass to test the conduction.

• Thnku :)