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Electrical Engineering MCQs: 3,658 practice questions with answer choices and available explanations. Page 208 of 244.

Electrical Engineering MCQs by topic

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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Electrical Engineering MCQs

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If the percentage impedances of the two transformers working in parallel are different, then________?

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A.transformers will be overheated
B.parallel operation will be not possible
C.power factors of both the transformers will be same
D.parallel operation will still be possible, but the power factors at which the two transformers operate will be different from the power factor of the common load
Explanation: The correct answer is parallel operation will still be possible, but the power factors at which the two transformers operate will be different from the power factor of the common load.

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Instantaneous power in inductor is proportional to the

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A.square of instantaneous current.
B.product of the instantaneous current and rate of change of current.
C.Temperature of the inductor.
D.square of the rate of change of current.
Explanation: The instantaneous voltage across the inductor is expressed as the product of inductance and rate of change of current through it. Power is expressed as the product of current and voltage. Hence instantaneous power in an inductor is proportional to the product of instantaneous current and rate of change of current through it.

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