Question

A magnetic compass shows a deflection when placed near a current carrying wire. How will the deflection of the compass get affected if the current in the wire is increased? Support your answer with a reason.
$\left( A \right)$ Increased
$\left( B \right)$ Decreased
$\left( C \right)$ Remain same
$\left( D \right)$ Data sufficient

Answer 1

Hint: Electric field is caused by stationary charges and magnetic field is caused by moving electric charges. Stationary charges cause electric fields. Non-relativistic proton beam passes without deviation through a region of space, then we can say that force due to magnetic field equals force due to electric field. Then we can determine the relation between the magnetic field and electric field.

Complete step by step answer:
A magnetic compass is made by using magnetized iron and that iron points towards the pole of the earth. When another magnet is brought near, the compass will point on towards the other magnet as its magnetic strength is stronger than earth’s magnetic strength.
When a current carrying wire is brought close to a magnetic compass then there will be a deflection in the magnetic compass due to the magnetic field formation. The magnetic field around a wire carrying electric current will form concentric circles around the wire. Based upon its orientation of the magnet, one of the end s will attract and the other end will repel.
The deflection will increase when the current is increased because the electric field is directly proportional to the magnetic field strength. We can say that the stronger the electric field, the stronger is the magnetic field.

Note: Whenever the electric current passes through a wire, the wire will behave like a magnet. A magnetic compass is made by using magnetized iron and that iron points towards the pole of the earth. Non-relativistic proton beam passes without deviation through a region of space, then we can say that force due to magnetic field equals force due to electric field.