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Power Electronics in Electrical Engineering MCQs: 217 practice questions with answer choices and available explanations. Page 5 of 15.

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Basic Electrical MCQs121Power Electronics217Transformers132Transmission and Distribution90D.C. Motors130D.C. Generators120Polyphase Induction Motors99Single Phase Induction Motors110Synchronous Motors122Network Theorems47Economics of Power Generation98A.C. Fundamentals, Circuits and Circuit Theory109Cables57Electrolysis and Storage of Batteries119Electrostatics180Magnetic Circuit28Rectifiers and Converters58Magnetism and Electromagnetism85Electromagnetic Induction85Switchgear and Protection102OP-AMP Circuits24Heating and Welding50Earthing or Grounding11Parallel Circuits25Oscillators28Amplifiers with Negative Feedback18Transistors42Semiconductor Diode44Analog Electronics46Hybrid Parameters12Modulation and Demodulation40Control Systems100Digital Electronics36Electric Traction74Electrical Engineering Materials100Electrical Machine Design103Electronic Instruments30Field Effect Transistors - FET47Industrial Drives70Integrated Circuits15Measurement and Instrumentation109Multi-Stage Transistor Amplifiers40Power Generation121Regulated D.C. Power Supply39SCR (Silicon Controlled Rectifiers)25Semiconductor Theory35Single Stage Transistor Amplifiers38Solid-State Switching Circuits29Transistor Audio Power Amplifiers39Transistor Biasing40Transistor Tuned Amplifiers40Series-Parallel Circuits29Passive Filters20Operational Amplifier30
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Power Electronics

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In variable frequency, PWM gain

0
A.Phase lag helps to decrease the phase margin of the control loop
B.Phase lead helps to increase the phase margin of the control loop
C.Phase lead helps to decrease the phase margin of the control loop
D.Phase lag helps to increase the phase margin of the control loop
Explanation: The correct answer is Phase lead helps to increase the phase margin of the control loop.

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Dynamic equalizing circuit is used for________?

0
A.equal division of voltage across each thyristor in parallel
B.equal division of current through each thyristor in series
C.equal division of current through each thyristor in parallel
D.equal division of voltage across each thyristor
Explanation: The correct answer is equal division of voltage across each thyristor.

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