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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
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
a galvanometer with a coil of resistance 120 ohm shows full scale deflection for a current of 25 ma how will you change the galvanometer into an
an electric dipole is held in a uniform electric field1 using suitable diagram show that it does not undergo any translatory motion and2 derive an
the image of a candle is produced by a convex lens on a screen the lower half of the lens is painted black to make it completely opaque illustrate
can the voltage drop across the inductor or the capacitor in a series lcr circuit be greater than the applied voltage of the ac
illustrate the graphs showing variation of inductive reactance and capacitive reactance with frequency of applied ac
explain the terms magnetic dip and magnetic declination with the help of relevant
illustrate v - i graph for ohmic and non-ohmic materials give one example for
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what should be the length of the dipole antenna for a carrier wave of frequency 3 x 1o8 hzdefine electric line of force and give its two important
electrons are emitted from a photosensitive surface when it is illuminated by green light but electron emission does not take place by yellow light
the power factor of an ac circuit is 05 what will be the phase difference among voltage and current in this
an electron beam projected along x-axis experiences a force because of a magnetic field along the y-axis what is the direction of the magnetic