What happens to the needle of a magnetic compass placed near a straight, thick copper wire fixed between points X and Y, when current flows through the wire perpendicular to the plane of the paper?
How does the needle behave before and after inserting the key to complete the circuit? What conclusion can you draw about the magnetic effect of electric current from this observation?
How does the needle behave before and after inserting the key to complete the circuit? What conclusion can you draw about the magnetic effect of electric current from this observation?
Electric circuit
We observe that the needle is .
What does it mean?
It means that the electric current flows through the copper wire have .
Thus, we can state that .