Electrical Machines The heat generated in the transformer is dissipated mainly by conduction. All of these radiation. convection. conduction. All of these radiation. convection. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 240 V dc series motor takes 40 A when giving its rated output at 1500 rpm. Its resistance is 0.3 Ω. The value of resistance which must be added to obtain rated torque at 1000 rpm is 6 Ω 1.9 Ω 2.2 Ω 5.7 Ω 6 Ω 1.9 Ω 2.2 Ω 5.7 Ω ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The mechanical power is developed by a DC motor is maximum when back emf is equal to twice of applied voltage. back emf is equal to half of applied voltage. none of above. back emf is equal to applied voltage. back emf is equal to twice of applied voltage. back emf is equal to half of applied voltage. none of above. back emf is equal to applied voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of following methods are suitable for the speed control of squirrel cage induction motor? 1. Voltage control. 2. Frequency control. 3. Pole changing method. 4. Rotor resistance control select the correct answer using the codes given below:- 1, 2 and 3. 2 and 4. 1, 3 and 4. 2, 3 and 4. 1, 2 and 3. 2 and 4. 1, 3 and 4. 2, 3 and 4. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The ___________________ generator has the poorest voltage regulation. under-compounded. over compounded. shunt. differential compounded. under-compounded. over compounded. shunt. differential compounded. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines DC machine is a both are correct. convection machine. none of above are correct. conduction machine. both are correct. convection machine. none of above are correct. conduction machine. ANSWER DOWNLOAD EXAMIANS APP
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