A.all of the above
B.increase the kinetic energy of valence electrons
C.reduce the energy gap
D.inject more charge carriers
Explanation: The correct answer is reduce the energy gap.
Submitted by: Academy of Pakistan
Electrical Engineering MCQs: 3,658 practice questions with answer choices and available explanations. Page 211 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
Showing page 211 of 244 · 3,658 total solved questions available.
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A.average voltage
B.r.m.s. voltage
C.none of the above
D.peak voltage
Explanation: The correct answer is r.m.s. voltage.
Submitted by: Academy of Pakistan
A.flux
B.inductance
C.reluctance
D.permeance
Explanation: The correct answer is permeance.
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A.both of above
B.none of the above
C.a current source
D.a voltage source
Explanation: The correct answer is a voltage source.
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A.remains the same
B.decreases
C.decreases by the value of the added resistor
D.increases by the value of the added resistor
Explanation: The correct answer is decreases.
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A.magnetic interference with communication circuits
B.all of the above
C.increased I2R losses
D.increased core losses
Explanation: The correct answer is all of the above.
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A.coal accelerators
B.belt conveyor
C.tower cranes
D.lift trucks
Explanation: The correct answer is coal accelerators.
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A.No stable state
B.One stable state
C.Two stable states
D.None of the above
Explanation: The correct answer is No stable state.
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A.A semi-conductor is a material whose conductivity is same as between that of a conductor and an insulator
B.A semi-conductor is a material made of alternate layers of conducting material and insulator
C.A semi-conductor is one which con¬ducts only half of the applied voltage
D.A semi-conductor is a material which has conductivity having average value of conductivity of metal and insulator
Explanation: The correct answer is A semi-conductor is a material whose conductivity is same as between that of a conductor and an insulator.
Submitted by: Academy of Pakistan
A.remains constant
B.decreases
C.increases
D.first increases and then decreases
Explanation: The correct answer is increases.
Submitted by: Academy of Pakistan
A.luminous effect
B.chemical effect
C.all above effects
D.thermal effect
E.magnetic effect
Explanation: The correct answer is all above effects.
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A.not necessary to standardise the potentiometer
B.none of the above
C.necessary to standardise the potentiometer
D.necessary to use a volt ratio box in conjunction with the potentiometer
Explanation: The correct answer is not necessary to standardise the potentiometer.
Submitted by: Academy of Pakistan
A.actual power is zero
B.reactive power is zero
C.none of above is zero
D.apparent power is zero
Explanation: The correct answer is actual power is zero.
Submitted by: Academy of Pakistan
A.slip ring induction motor
B.schrage motor
C.synchronous motor
D.d.c. shunt motor
Explanation: The correct answer is slip ring induction motor.
Submitted by: Academy of Pakistan
A.Centrifugal pump
B.Floor mill
C.Lifts and hoists
D.Oil expeller
Explanation: The correct answer is Lifts and hoists.
Submitted by: Academy of Pakistan