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Explain the term 'resistivity' and write its S. I . unit. Derive the expression for the resistivity of a conductor in terms of number density of free electrons and relaxation time.
How is a wave front dissimilar from a ray ? Draw the geometrical, shape of the wave fronts when (i) light diverges from a point source, and (ii) light emerges out of a convex le
The atomic number of an element represents: (1) Number of neutrons in the nucleus (2) Number of protons in the nucleus (3)Atomic weight of element (4)Valency of el
Mach number is the ratio of velocity of source to the velocity of sound. Mach Number = Velocity of Source / Velocity of Sound .
The energy needed to ionize an atom is known as ionization energy. It is the energy needed to make the electron jump from the present orbit to the infinite orbit.
How can ultrasonic waves be detected Kundt’s tube method? Ultrasonic waves can be detected by Kundt’s tube. There at the nodes, lycopodium powder collects into the form of heap
Briefly explain with principle, the construction and working of Nicol prism. Why the angle of incidence on Nicol prism would be around 14 o .
DUE TO SURFACE TENSION WATER MOLECULES TEND TO HAVE MINIMUM SURFACE AREA AND SPHERE HAS THE MINIMUM SURFACE AREA FOR A GIVEN VOLUME AND THEREFORE BUBBLES ARE IN SPHERICAL SHAPE ONL
the center of oscillation of a meter stick suspended about a transverse axis is located at 10 cm mark. determine at what other positions the meter stick could be suspended and have
Nuclear medicine imagining devices : Imagining ,or producing pictures of the distribution of the radioactivity is the most important aspect of nuclear medicine. Rectilinear s
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