Question

What are magnetic field lines? How is a
magnetic field at a point determined ?
List three properties of magnetic field
lines,​

Answer 1

Explanation:

$\bigstar$$\boxed{\underline{\underline{\bold{\mathsf{Magnetic\:Field\:lines:</p><p>}}}}}$:—

Magnetic field lines is an imaginary curve which originates from one pole and tends to move towards the next pole along a free path.

$\bigstar$$\boxed{\underline{\underline{\bold{\mathsf{How\:is\:a\:</p><p>magnetic\:field\:at\:a\:point\:determined\:?</p><p>}}}}}$

◽The direction of a magnetic field at a point can be determined by simply placing a small compass needle close to these lines and by detecting the deflection in the needle as below:

◾Compass will indicates the direction of magnetic field at that point as below:

◾Away from the north pole of the magnet and toward the south pole of the magnet.

$\bigstar$$\boxed{\underline{\underline{\bold{\mathsf{Three\:properties\:of\:magnetic\:field\:</p><p>lines}}}}}$

$\implies$They never intersect one another.

$\implies$Strength of every field line is same.

$\implies$The field that originated is tangent to the magnetic field line.

$\implies$Field strength is directly proportional to the density of line.

$\implies$ The density of lines are more at the poles.