What is hysteresis ?

What is a hysteres curve ? Give any one application of study of hysteresis curve

What is dispersion ? What happens when light is passed through a glass prism ?

What are the major divisions in the Plantae ? What is the basis for these divisions ?

Explain the significance of narrow hysteresis loop.

The hysteresis loop of a soft iron piece has a much smaller area than that of a carbon steel plece. If the material is to go through repeated cycles of magnetisation, which piece will dissipate greater heat energy?

What are interferons? What is their significance?

What is photoperiodism ? What is its significance ?