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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
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
an electric dipole of dipole moment 20 x 10-6 cm is enclosed by a closed surface what is the net flux coming out of the
assume the condition for balance in a wheatstone bridge using the principle of wheatstone bridge describe the method to determine the specific
write an expression for the force experienced by a charged particle moving in a uniform magnetic field b with the help of a diagram define the
derive an expression for the torque acting on a loop of n turns area a carrying current i when held in a uniform magnetic field with the help of
name the device used for data transmission from single computer to an other justify the nameusing this device draw the block diagram for data
with the help of relevant diagrams define the following termsi pulse-position modulation ppmi pulse-duration modulation
with the help of a bb diagram define the principle of an optical communication systemgive its two advantages over cable communication
write the symbol sad truth table of an and gate define how this gate is realised in practice by using two
draw the circuit diagram of a common-emitter amplifier using an n-p-n transistor draw the input and 1p waveforms of the signal write the expression
explain the term work function of a metal the threshold frequency of a metal is f0 when the light of frequency 2f0 is incident on the metal plate the
state two conditions to obtain sustained interference of lightin youngs double slit experiment using light of wavelength 400 nm in terference fringes
state gauss theorem in electrostatics using this theorem derive the expression for the electric field intensity at any point outside a uniformly