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necessity of a starterfor dc motors when motor is at rest then n0 and due to eb is directly proportional to n so at begin eb
the shape of an orbital is given by the quantum number1 n 2
the quantum number which specifies the location of an electron as well as energy is1 principal quantum number2 azimuthal quantum number3 spin quantum
the stem cellsthe stem cells are undifferentiated mesenchymal cells that can proliferate and differentiate into many other types of cellsthese are
bes 4th electron will have four quantum numbers n l
rotor i squirrel -cage rotorii phase-wound or wound-rotor90 of induction motor are squirrel cage type due to this type of rotor has a easiest and
stator it is made up of a number of stampings which are slotted to be given windings the stator carries 3phi windings and is fed from 3phi supply
for an electron if the uncertainty in velocity is delta v the uncertainty in its position delta x is given by1 hm 4 pi delta
working principle of dc motora an electric motor is a machine which changes electrical energy into mechanical energyb when a current carrying
synchronous motor can work at any power factor ie lagging unity or at leading power factor synchronous motor when used to better the power factor
step to improve power factorby using static capacitorstatic capacitor is generally used to get better the power factor of the power system as the
according to heisenbergs uncertainty principle the product of uncertainties in position and velocities for an electron of mass 91x 10 -31 kg is1 28x
causes of low power factorthe major causes of low power factor in the electric supply system are as follows due to reactive load most of the ac
disadvantage of low power factor we know that p v i cos phi for particular amount of power at constant voltage power p and voltage v in
shell type transformers in this type of transformer the iron core surrounds the copper windings the core is in the shape of numeral 8 the
the uncertainty in momentum of an electron is 1 x 10-5 kgm s the uncertainity in its position will be h 663 x 10 -34 js 1 528 x 10 -30m
uncertainty in position of a 025 g particle is 10-5 uncertainty of velocity h 66 x 10 -34 js is1 12 x 10 34 2 21
advantages and disadvantages of three phase system over single phase systema in a single phase circuit the power delivered is pulsating in three
in a pulley system the eqn for length of inextensible string is y plus sq root of x2h2constant how to differentiate y plus sq root of x2h2constant
2 cars 1 and 2 starting from rest are moving with speeds v1 and v2 msv1gtv2 car 2 is ahead of car1 by 3939s3939 metres when the driver of car 1 sees
find an integrating factor for the linear differential equation and hence 214nd its general solution solve t 2 dy
most of the world3939s flightless birds are either nocturnal and secretive eg the kagu or large swift and well-armed the ostrich the exceptions are
used normally a 150-watt 120 volt light bulb requires how many amps of currentansused generally a 150-watt 120 volt light bulb needs 125
five volts are applied across the plates of a parallel plate capacitor the distance of separation of the plates is 02 meters what is the magnitude of
the force acting between two point charges can be computed using which of the following lawsa ohms lawb amperes lawc coulombs lawd newtons second