क्वार्ट्ज क्रिस्टल एक अंकीय घड़ी में किस प्रकार काम करता है, समझाएं।
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चाँदी के लिए फर्मी ऊर्जा है। निम्नलिखित में से कौन सा सही है, समझाएं :
(क) ऊर्जा अवस्थाओं का घनत्व पर अधिक है,
(ख) ऊर्जा अवस्थाओं का घनत्व पर अधिक है, अथवा
(ग) ऊर्जा अवस्थाओं का घनत्व दोनों ऊर्जाओं पर एकसमान है।
Explain, with a diagram, the operation of a photovoltaic solar cell.
Is the following statement true for vibrations of a chain of two different types of atoms: “At the centre of the Brillouin zone, the frequency of the optical branch is less than the frequency of the acoustic branch”? Explain.
List the symmetries of the molecule.
A metal has an fcc structure, a lattice parameter , and a valence
. Calculate its Hall coefficient.
The values of the elastic stiffness constants for are:
Given that the density of is
, determine the bulk modulus of elasticity and the velocity of the transverse and longitudinal elastic waves in the [100] direction.
A plane intercepts the x-axis at 3a, the y-axis at 2b and the z-axis at 4c. Determine the Miller indices of this plane.