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two coils of self-inductance 50 mh and 85 mh respectively are placed parallel to each other if the coupling coefficient
two air-cored coils a and b are wound with 100 and 500 turns respectively a current of 5 a in a produces a flux of 15
a coil of 5000 turns is wound on to a nonmagnetic toroid of csa 100 cm2 and mean circumference 05 m a second coil of
1 when the current in a coil changes from 2 a to 12 a in a time of 150 ms the emf induced into an adjacent coil is 8 v
an iron ring of mean length 50 cm and csa 08 cm2 is wound with a coil of 350 turns a current of 05 a through the coil
1 calculate the self-inductance of a 700 turn coil if a current of 5 a fl owing through it produces a flux of 8 mwb2 a
1 explain what is meant by the term lsquo loading effect 2 a voltmeter having a figure of merit of 15 k omega volt has
for the meter movement described in question 19 above show how it may be adapted to serve as a voltmeter with voltage
1 the magnetic flux density at a distance of 14 m from the centre of a current carrying conductor is 025 mt determine
two long parallel conductors are spaced 12 cm between centres if they carry 100 a and 75 a respectively calculate the
a moving coil meter has a coil of 60 turns wound on to a former of effective length 225 mm and diameter 15 mm if the
the coil of a moving coil meter is wound with 75 turns on a former of effective length 25 cm and diameter 2 cm the
a shunt generator supplies a current of 85 a at a terminal pd of 380 v calculate the generated emf if the armature and
the waveform displayed on an oscilloscope is as shown in fig 640 the timebase is set to 100 muscm and the y-amp is set
for each of the following alternating quantities determinea the amplitude and rms value andb the frequency and periodi
write down the standard expression for a voltage of rms value 45 v and frequency 15 khz hence calculate the
a sinusoidal voltage is generated by an 85 turn coil of dimensions 20 cm by 16 cm the coil is rotated at 3000 revmin
a sinusoidal current has a peak-to-peak value of 15 ma and a frequency of 100 hza plot this waveform to a base of time
1 a coil is rotated between a pair of poles calculate the frequency of the generated emf if the rotational speed isa
a substation operating at 33kv is divided into sections a and b section a consist of three generators 15mva each having
a what is the difference between a primitive cell and a unit cell what is the utility of both conceptsb what is the
a simple voltage stabiliser circuit is shown in fig 920 the zener diode is a 75 v 500 mw device and the supply voltage
the dielectric of a 20 muf capacitor has a resistance of 65 m omega this capacitor is fully charged from a 120 v dc
define the time constant of a capacitor-resistor series circuit such a circuit comprises a 50 mu f capacitor and a
a 5 h inductor has a resistance r ohm this inductor is connected in series with a10 omega resistor across a 140 v dc