Magnetic Field and Field Lines

A magnet will align in South-North direction when there is no separate magnetic field present.

The end of the magnetic needle pointing the South side will be its north pole.

How will a magnet align if there is no magnetic field present? Which pole will be aligning towards the South side?

Two magnetic field lines can never ever intersect.

An electric field has a direction, but a magnetic field does not.

The SI unit of magnetic field induction is _________.

Select the properties of magnetic field lines that explains repulsion and attraction between poles.

(A) Magnetic lines of force are in a state of tension like a stretched spring.

(B) Magnetic lines of force repel each other.

(C) Magnetic lines of force do not intersect each other.

Select the incorrect property of magnetic field lines.

The _____ (normal/tangent) to the field lines at a given point represents the direction of the net magnetic field at that point. 
 

Define magnetic lines of forces using diagram.

Magnetic lines of force always cross each other.

Select the correct statement(s) related to properties of magnetic field lines.

A magnetic _____ is an ​electromagnetic tester.

Select the sources of electric energy.

The magnet made by using the electric current is called as _____.

An electric bell is based on the principle of the _____.

A current-carrying coil of an insulated wire wrapped around a piece of iron is called as _____.

When an electric current passes through a wire, it behaves like a _____.

The deflection of a compass needle when the current flows in a nearby wire shows the:

If the key in the arrangement (figure) is taken out (the circuit is made open) and magnetic field lines are drawn over the horizontal plane $ABCD$, the lines are