Explain the attraction and repulsion between magnetic poles.

Assertion : The elastic spring force arises due to the net attraction or repulsion between the neighbouring atoms of the spring when it is elongated of compressed. Reason : The laws of derived forces such as spring force, friction force are independent of the laws of fundamental forces in nature.

A magnet has ______magnetic poles.

Explain coupling and repulsion aspects of linkage with the help of examples.

State Coupling and Repulsion theory.

Consider a gold nucleus to be a sphere of redius 6.9 fermi in whichprotons and neutrons are distributed. Find the force of repulsion between two protons situated at largest separaton. Why do thes protons not fly apart under this repulsion

Explain the Motion of a charged particle in a uniform magnetic field.

Circle the odd ones and give reasons: Attraction, repulsion, pointing direction, illumination.