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the magnifying power of an astronomical telescope in the normal adjustment position is 100 the distance among the objective and the eye-piece is 101
a compound microscope with an objective of 10 cm focal length and an eye-piece of 20 cm focal length has a tube length of 20 cm measure the
with the help of a diagram show the biasing of a light emitting diode led give its two benefits over conventional incandescent
draw the graph showing the variation of binding energy per nucleon with mass number give the reason for the decline of binding energy per nucleon for
what is the wavelength of electromagnetic waves of frequency 5 x 1019hz in free space give its two
two circular coils one of radius r and the other of radius r are placed coaxially with their centres coinciding for r gtgt r get an expression for
explain the terms i magnetic declination and ii angle of dip at a given
heavy water is often used as a moderator in thermal nuclear reactors give
what i the name given to that kind of electromagnetic spectrum which is used for taking photographs of earth under foggy conditions from great
name the part of modulation scheme preferred for digital
draw a circuit diagram of a common emitter amplifier by using n-p-n transistor show input and output voltages graphicallythe current gain for common
draw a ray diagram to show the formation of image of an object placed among the optical centre and focus of the convex lens write the characteristics
write three special characteristics of the light source used in optical communication name any one optical detector define the meaning of the term
what is meant by the term modulation define with the help of a block diagram how the process of modulation is carried out in radio
state huygens principle for reflection of a plane wave front at a plane reflecting surface construct the corresponding reflected wave front using
distinguish among diamagnetic and ferromagnetic materials in respect of their i intensity of magnetisation ii behaviour in a non-uniform magnetic
two straight parallel current carrying conductors are kept at a distance from each other in air the direction of present in both the conductors is
what is meant by the sensitivity of a potentiometera battery e1 of 4 v and a variable resistance r h are linked in series with the wire ab of the
what is wheatstone bridge assume the condition for which wheatstone bridge is
explain drift velocity of free electrons derive ohms law on the basis of the theory of electron
an ac voltage e e0 sin cot is applied across an inductor l get an expression for current idraw a labelled diagram of van de graff generator verify
give any two methods of electric lines of force sketch them for an isolated positive point
how does the i pole strength and ii magnetic moment of each part of a bar magnet change if it is cut into two equivalent pieces transverse to its
what occurs to the power dissipation if the value of electric current passing by a conductor of constant resistance is doubled normal 0 false
explain electrical conductivity of a conductor and give its si unitwrite si unit of magnetic flux is it a vector or a scalar