Mechanical Properties of Fluids — Physics STD 12 Science — Question

Draw neat labelled diagrams for modes of vibrations of an air column in a pipe when it is:
(a) open at both ends (b) closed at one end.
Hence derive an expression for fundamental frequency in each case.

Name two materials that have small and positive magnetic susceptibility.

State (i) Stefan-Boltmann law and
(ii) Wein’s displacement law.

Explain classification of thermodynamic systems.

State the differential equation of linear simple harmonic motion. Hence obtain the expression for acceleration, velocity and displacement of a particle performing linear S.H.M.

Why do grinding wheels have large mass and moderate diameter?

Photocurrent recorded in the micro ammeter in an experimental set-up of photoelectric effect vanishes when the retarding potential is more than 0.8 V if the wavelength of incident radiation is 4950 Å. If the source of incident radiation is changed, the stopping potential turns out to be 1.2 V. Find the work function of the cathode material and the wavelength of the second source.

How does a dc generator differ from an ac generator?

Explain the concept of free path of a gas molecule. Define free path and mean free path. State the expression for mean free path.