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one of the functions of the insulation is hest transfer. consider an underground cable under operation. this cable is recommended for operations.
volume resistance the resistance provided to the current which flows through the material is called volume resistance. for a cube of unit dimensions
this is the virtue of a material resists flow of electric current. it should be as high as possible. when material is subjected to an electrical
it is defined as the dielectric loss expressed as the tangent of the angle between the reactance and the impedance vectors of the capacitor it is
electrical properties of dielectric materiala loss of energy which eventually produces a rise in temperature of a dielectric placed in an alternating
electrical properties of dielectric materialsthe term dielectric strength of a dielectric material means the maximum electric field strength that it
electrons have very much smaller mass than that of ions so they respond more rapidly to a changing electric field. for electric field that oscillates
in the presence of electronic ionic and dipolar polarization mechanisms the average induced dipole moment per molecule will be the sum of all
interfacial polarization takes place whenever there is an storage of charge at an interface between two materials or between two regions in a
in the case of orientation polarization we have material with built in dipoles that are independent of each other i.e. they can rotate liberally in
the contribution of ionic polarization takes account of the fact that when in a molecule some of the atoms have an excess positive or negative charge
it is defined as an electric strain produced in an atom due to application of external electric field to the bulk material. it is the result of the
an atom is said to be polarized if it possesses and effective dipole moment that is if there is a separation between the centres of negative and
an electrical dipole is just a separation between a negative and positive charge of the same magnitude. consider that a dielectric material is
consider that two large parallel plates forming a capacitor are separated by a distance d with vacuumed as the dielectric medium between the plates.
how to calculate speed of light? the speed of light in vacuum normally denoted by symbol c is a universal physical constant which is very
explain the principle of particle detection. draw log n-v graph showing different regions and discuss the significant physical processes taking place
describe the principle construction and working of a scintillation counter. with suitable diagram explain various components of a scintillation
what is dielectric breakdown? explain briefly the various factors contributing to breakdowns in dielectrics.ans. electric breakdown when the electric
what do you mean by dead time in gm counter? draw a neat diagram at gm counter and explain its working. mention some of its applications. give basic
what is index fiber? how you define the modes in an optical fiber? give a relation between core diameter and numerical aperture. ans. the index
describe the construction of optical fiber. explain the principle of propagation of light waves within a fiber. define acceptance angle and
define coherence and explain temporal and spatial coherence. show that visibility is a maxim of coherence. define the q factor for a spectral line.
neuroscience is a scientific study of the nervous system. usually neuroscience has been seen considered as a branch of biology. thus it is now
neural coding is a neuroscience based field mainly concerned with characterizing the relationship bw the stimulus amp the individual and ensemble