Question

if the current in a straight conductor is increased the strength of the magnetic field

1) remain same
2) increase
3) decrease
4)none​

Answer 1

Explanation:

If the current in the wire increases then the needle of the compass needle placed at that point gets deflected by a larger angle. The strength of magnetic field at a point due to this current carrying conductor is directly proportional to the current.

Answer 2

Answer:

On increasing the current through the conductor the strength of magnetic field will increase.

Explanation:

The strength of the magnetic field at a distance r from a current carrying conductor is given by the relation:

B = (μo/2π)I/r.  

So increasing the current will increase the magnetic field strength.