Question

Why is the magnetic field strength inside a current carrying loop of wire greater than the field strength about a straight section of wire?

Answer 1

hello it has found that the magnetic field increases if we use a coil instead of a wire as if we use a coil same current frow through each turn which gets add up resulting in large current thus large magnetic field .magnetic field are inversely proportional to radius.so they are strongest where radius is less that is inside the coil

Answer 2

$\fbox \green { Strength of the Magnetic field due to the current in a straight wire }$

A compass needle get deflected when brought near a current carrying wire. If the current in the wire is increased by applying a greater potential difference across it, the needle get deflected by larger angle. this means that the strength of the magnetic field increases with increase in current. in fact, the strength of the magnetic field produced by an electric current is directly proportional to the current.

If you move a compass away from a current carrying wire, you will notice that as the distance of the compass from the wiring creases, the deflection of his needle decreases. This means that the strength of the magnetic field produces with distance from the wire. For a long , straight current carrying wire the strength of the magnetic field is inversely proportional to the distance.