A.Variable resistors
B.Varistors
C.Semi-conductors
D.Thermistor
Explanation: The correct answer is Semi-conductors.
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Electrical Engineering MCQs: 3,658 practice questions with answer choices and available explanations. Page 131 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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Showing page 131 of 244 · 3,658 total solved questions available.
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A.Heat sink.
B.Snubber circuit.
C.Voltage clamping device.
D.CB and fuse.
Explanation: The correct answer is CB and fuse..
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A.Thermal power plants
B.Hydro-electric power plants
C.Nuclear power plants
D.Diesel engine power plant
Explanation: The correct answer is Thermal power plants.
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A.All of the above
B.Self-excited generator
C.Separately excited generator
D.Level compounded generator
Explanation: The correct answer is Level compounded generator.
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A.Both harmonic distortion and quality of input current increases
B.Both harmonic distortion and quality of input current decreases
C.Harmonic distortion increases and quality of input current decreases
D.Harmonic distortion decreases and quality of input current increases
Explanation: The correct answer is Harmonic distortion increases and quality of input current decreases.
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A.None of the above
B.All the co-efficients are always non-zero
C.All the co-efficients can have zero value
D.Only one of the static error co-efficients has a finite non-zero value
Explanation: The correct answer is Only one of the static error co-efficients has a finite non-zero value.
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A.back e.m.f. of these motors is zero initially
B.to restrict armature current as there is no back e.m.f. while starting
C.these motors are not self-starting
D.these motors have high starting torque
Explanation: The correct answer is to restrict armature current as there is no back e.m.f. while starting.
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A.increases
B.decreases
C.becomes temperature independent
D.remains constant
Explanation: The correct answer is increases.
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A.total copper loss and mechanical loss
B.iron loss and mechanical loss
C.armature copper loss and iron loss
D.shunt field copper loss and mechanical loss
Explanation: The correct answer is iron loss and mechanical loss.
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A.to short circuit the starting resistances in the starter
B.to short circuit the stator phase of motor to form star
C.to short circuit the rotor at slip rings
D.none of the above
Explanation: The correct answer is to short circuit the rotor at slip rings.
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A.Manganin
B.Eureka
C.Nichrome
D.Kanthal
Explanation: The correct answer is Kanthal.
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A.reduce all above losses
B.reduce copper losses
C.reduce eddy current losses
D.reduce hysteresis loss
Explanation: The correct answer is reduce eddy current losses.
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A.copper
B.aluminium
C.graphite
D.boron carbide
Explanation: The correct answer is boron carbide.
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A.100 % positive
B.Negative
C.Both positive and negative
D.None of the above
Explanation: The correct answer is 100 % positive.
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A.Ideal current source
B.All of the above
C.Ideal voltage source
D.Capacitance
Explanation: The correct answer is Capacitance.
Submitted by: Academy of Pakistan