Deepakkumar Yadav
The concept of V/f control of inverters driving induction motors results in (A) Constant torque operation (B) Speed reversal (C) Reduced magnetic loss (D) Harmonic elimination Answer So, if we maintain the flux is a constant value, then torque also will be a constant value. Correct Answer is (A) Constant Torque Operation.
Steam Prime Movers (Turbine) in Thermal Power Plant Steam prime movers are either reciprocating steam engines or steam turbines. Due to reciprocating motion steam engines have become obsolete in now-a-days, and steam turbines are usually used as prime movers. They have several advantages over steam engines as prime mover. It has higher thermodynamic efficiency. Its … Read more
Step Up Chopper Q. Explain principle of step – up chopper with neat circuit diagram Q. Draw a neat circuit and explain the working of step up chopper Q. Describe step up chopper with neat circuit diagram. Draw its input and output waveforms. Q. Describe step up and step down chopper with neat diagram. Q. … Read more
Eddy current loss will depends on (A). Frequency(B). Flux density(C). Thickness(D). All of the above Answer is So eddy current loss will depend upon frequency, flux density and the area of the eddy current loop. Correct answer is (D) All of the above.
Four Quadrant Chopper (Type E Chopper) Questions Q. Classify chopper based on output voltage and quadrants of operation. List any four applications of chopper. Q. Classify choppers based quadrants of operation. Sketch only circuit diagram of each. Q. Explain the operation of four quadrant chopper. Q. Draw the circuit diagram of class E-chopper and explain … Read more
ELECTRICAL MCQ A Shunt generator running at 1000 rpm has generated emf of 100 V. If the speed increases to 1200 rpm, the generated emf will be nearly 120 V 140 V 175 V 240 V Answer From When other thing remains constant. E2 = 120 V Correct Answer is 120V.
The unit of resistivity is Ω. Ω – metre. Ω / metre. Ω / m². Answer is The unit of resistivity is Ω – metre.
Series Circuit Figure (A) series circuit. The same current flows through all the resistors. An electric circuit can be arranged in several ways, as long as the path for the electric current is closed. The simplest arrangement is the so-called series circuit. The series circuit has all the elements of the circuit connected onto each … Read more
What are the reasons for electric shocks? The human failure in handling the electrical components or repairing the distribution system without switching off the supply, the ultimate effect of electric shock on human body may be death. Electric shock on human body may be fatal but it may be due to Electric shock may result … Read more
Introduction of Induction Motor The most basic feature of an Induction motor is its self starting mechanism. Due to the rotating magnetic field, an emf is induced in the rotor, because of which current starts flowing in the rotor. As per the Lenz law, the rotor will start rotating in a direction so as to … Read more