A system displaying a hysteresis loop such as a ferromagnet, is a device for storing memory? Explain the meaning of this statement.

What type of ferromagnetic material is used as the memory store of modern computers .

Explain the phenomenon of hysteresis in magnetic materials. Draw the hysteresis loop and explain retentivity and coercivity.

Explain the meaning of the statement 'electric charge of a body is quantised'

The room mean square velocity of an ideal gas in a closed vessel of fixed volume is increased from 5xx10^(4)cm*s^(-1) to 10xx10^(4)cm*s^(-1) . Which of the following statements correctly explain how the change is accomplished-

Consider the following statements reagarding the root system of angiosperms I. In monocots, the Fibrous root system arises from base of stem. II Region of elongation is called root hair zone . III In sweet potato, adventitious roots get swollen and store food IV. Stem of Maize and Sugaracane have supporting roots called prop roots

The root mean square speed of an ideal gas in a closed container of fixed volume is increased from 5*10^4cms^-1 to 10 * 10^4cm^-1 . Which statement might correctly explain how the change accomplished’?

Mention two functions of nervous system. What do you mean by 'reflex action' Explain with one suitable example.

What does the statement "electronic orbits at stationary state" mean? Does an electronn remain stationary in a stationary orbit? Explain.