Question

What are magnetic effect of electric current

Answer 1

when a current is passing through a conductor it produces a magnetic effect around it , and this phenomena is called as the magnetic effect of electric current

this can be understood by placing a compass near the conductor , the needle will rotate 

Answer 2

The magnetic effect of electric current is known as electromagnetic effect. The magnetic effect of an electric current was discovered by Hans Christian Oersted in 1820.

When a compass is brought near a current carrying conductor the needle of compass gets deflected because of flow of electricity and electric current produces a magnetic effect.