O Each shunt field coil od DC -Generator produces 2,700 amp – turns. How many turns are there in the coil if the current is 1.5 amp?
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- In DC generators, lap winding is suitable for ) high voltage, high current O low voltage, high current O high voltage, low current O ) low voltage, low curren O(a) Show the voltage waveforms across each half of the secondary winding and across RL when a 100 V peak sine wave is applied to the primary winding in Figure. (b) what is Vavg and fout if fin = 50 Hz?Magnetic field force lines created by the primary coil in transformers pass through the secondary coil and an induction current occurs in the secondary coil. What is the reason for induction current in the secondary coil?
- amature windings commonly used in DC machines a DC shunt generator are wound with a large numbe C generator can be used for battery charging?In DC generators brushes are used for O Collecting Current O Collecting eddy current loss O reduce eddy current loss O convert ac armaturê current in to dcUntitled Section Jalis 6 In d.c. generators armature reaction is produced by field current O armature current commutating winding current none of the mentioned compensating winding current *.The use of d.c. generators eliminated the use of rectifiers and ac supplies True False O
- 10. A potential difference of 250 V is applied to a field winding at 15-C and the current is 5 A. What will be the temperature of the winding when current has fallen to 3.91 A applied voltage being constant. Assume temperature coefficient at 15'C is equal to 1/254.5 per °CIn DC machines the number of parallel paths for a wave winding generator is Select one: O a. Three O b. Two OC. Half the number of poles O d. Equal to Number of PolesIs this armature winding a progressive or a retro-progressive winding? W N Select one: 2 B 4' O a. Both O b. Progressive OC. Neither O d. Retro-progressive B S
- A magnetic ring has reluctance of 1.675 × 10⁰ AT weber. The flux to be produced by the coil is 800 x 10 webers, then the AT required for the m.m.f. will beThe compensating winding is connected in ) parallel with main poles O series with main poles O parallel with armature O series with armature OThe magnetic flux through each turns off a 100-turn coil is (³-2) milli-webers where t is in seconds. The induced EMF at t = 2 second is?