In what way is the behavior of a diamagnetic material different from that of a paramagnetic, when kept in an external magnetic field?

A charge 'q' is moved from a point A above a dipole of dipole moment 'p' to a point B below the dipole in equatorial plane without acceleration. Find the work done in the process.

Name the essential components of a communication system.

Why does sun appear red at sunrise and sunset?

The plot of the variation of potential difference across a combination of three identical cells in series, versus current is shown below. What is the emf and internal resistance of each cell?