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1 a flux of 15 mwb linking with a 250 turn coil is uniformly reversed in a time of 002 s calculate the value of the emf
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
1 a coil has 300 turns and an inductance of 5 mh how many turns would be required to produce an inductance of 08 mh if
1 when a current of 25 a flows through a 05 h inductor the flux produced is 80 wb determine the number of turns2 a 1000
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
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
1 a conductor when placed at right angles to a magnetic field of density 700 mt experiences a force of 20 mn when
project - r coding and modellingproblem 1 -as a data scientist hired by uber you have been asked to simply figure out
figure 544 represents two of the armature conductors of a dc generator rotating in a clockwise direction copy this
1 a coil of 15 000 turns is required to produce an emf of 15 kv determine the rate of change of flux that must link
1 when a magnetic flux linking a coil changes an emf is induced in the coil explain the factors that determinea the
1 a waveform has a form factor of 16 and an average value of 10 v calculate its rms value2 a moving coil voltmeter
1 calculate the peak and average values for a 250 v sinusoidal supply2 a sinusoidal current has an average value of 38
for a current of rms value 5 a and frequency 2 khz write down the standard expression hence calculatea the
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
a coil is rotated between a pair of poles calculate the frequency of the generated emf if the rotational speed isa 150
1 a coil of self-inductance 004 h has a resistance of 15 omega calculate the energy stored when it is connected to a 24
1 sketch the circuit symbol for a transformer and explain its principle of operation why is the core made from
1 a 41 voltage lsquo step-down transformer is connected to a 110 v ac supply if the current drawn from this supply is