Question

what is magnetic tester of electric current?​

Answer 1

Explanation:

The magnetic effect of electric current is known as electromagnetic effect. It is observed that when a compass is brought near a current carrying conductor the needle of compass gets deflected because of flow of electricity. This shows that electric current produces a magnetic effect.

Answer 2

Answer:

When a small amount of current is flowing through the conductor, the bulb will not glow as the filament of the bulb will not get heated up. Hence, inorder to detect the presence of small value of current, we need magnetic compass. The magnetic compass will get deflected even if there is a small value of current.