Electrical Machines Eg (generated emf) and Eb (back emf) both are same. different. changes. none of above. same. different. changes. none of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The voltmeter connected across a generator reads voltage same at no load and at full load (rated). The generator is of the type level compound. series generator. shunt generator. short - shunt generator. level compound. series generator. shunt generator. short - shunt generator. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole dc motor with armature winding resistance of 0.6 ohm receives a supply of 230 Volt. If the back emf produced during running condition is equal to 210 volt. Calculate the current flowing through the armature at this point. 33.33 Amp. 43 Amp. 29 Amp. 44.47 Amp. 33.33 Amp. 43 Amp. 29 Amp. 44.47 Amp. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The use of double squirrel cage winding on the rotor provides low noise. reduced starting torque. higher efficiency. a large starting torque. low noise. reduced starting torque. higher efficiency. a large starting torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature of DC machine is made of insulating material. silicon steel. conducting material. non-ferrous material. insulating material. silicon steel. conducting material. non-ferrous material. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements about commutating poles which are fitted on most large dc Shunt motors: 1. The commutating poles are placed in the geometric neutral plane and their number is usually Equal to the number of main poles 2. The winding on the commutating poles is connected in series with the shunt-field winding on the main poles 3. The polarity of the commutating pole must be that of the next pole further ahead 4. The commutating poles neutralize the reactance voltage produced in the coil undergoing Commutation. Of these statements, 1, 2 and 4 are correct 1, 2 and 3 are correct 2, 3 and 4 are correct 1 and 4 are correct 1, 2 and 4 are correct 1, 2 and 3 are correct 2, 3 and 4 are correct 1 and 4 are correct ANSWER DOWNLOAD EXAMIANS APP
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