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describe with the help of a nuclear reaction in each of the following cases how the neutron to proton ratio alters duringi alpha-decayii
define the terms threshold frequency and stopping potential in relation to the phenomenon of photoelectric effect how is the photoelectric current
how is the mutual inductance of a pair of coils affected wheni separation among the coils is enhancedii the number of turns of each coil is
verify the principle of working of a cyclotron write two uses of this machinedraw a labelled ray diagram of a reflecting type telescope write its any
write the mathematical relation among mobility and drift velocity of charge carriers in a conductorname the mobile charge carriers responsible for
the electric field and electric potential at any point because of a point charge kept in air is 20 nc-1 and 10 jc-1 respectively compute the
with that purpose was famous davisson-germer experiment with electrons performedname the type of communication in which the sign is a discrete and
explain the term dielectric constant of a medium in terms of capacitance of a capacitordraw a graph showing variation of resistivity of carbon with
explain briefly with the help of circuit diagram how v - i characteristics of a p-n junction diode are obtained iii forward bias andii reverse
a distinguish among metals insulators and semiconductors on the basis of their energy bandsb why are photodiodes used preferably in reverse bias
compare and contrast the pattern which is seen with two coherently illuminated narrow slits in youngs experiment with that seen for a coherently
in youngs double slit experiment deduce the conditions for i constructive and ii destructive interference at a point on the screen draw a graph
state huygens principle with the help of a suitable diagram prove snells law of refraction using huygens
how is a wave front dissimilar from a raydraw the geometrical shape of the wave fronts when i light diverges from a point source and ii light emerges
state biot-savarts law using this law derive the expression for the magnetic field because of a current carrying circular loop of radius r at a point
a with the help of a labelled diagram define the principle and working of a moving coil galvanometerb two parallel coaxial circular coils of equal
draw a schematic diagram of a single optical fibre structure describe briefly how an optical fibre is fabricated explain in brief the mechanism of
distinguish among analog and digital communication write any two modulation methods employed for the digital data explain briefly one of the
explain with the help of a circuit diagram how the thickness of depletion layer in a p-n junction diode alters when it is forward biased in the
write two characteristic features of nuclear force which differentiate it from the coulomb
draw a graph showing the variation of potential energy of a p of nucleons as a function of their separation show the regions in which nuclear force
a figure separated into squares each of size 1 mm2 is being viewed at a distance of 9cm by a magnifying lens of local length 10cm held close to the
give reasons for the followingi long distance radio broadcasts use short-wave bandsii the small ozone layer on top of the stratosphere is crucial for
define with the help of diagram the principle and working of an ac generator write the expression for the emf generated in the coil in terms of its
verify the principle of potentiometer illustrate a circuit diagram used to compare the emf of two primary cells write the formula used how can the