|
 Electromechanical Energy Conversion Principles 40 Flashcards |
Start
|
|
What is the primary function of an electromechanical energy conversion device? |
Card: 1 / 40 |
|
|
To convert electrical energy into mechanical energy or vice versa. |
Card: 2 / 40 |
|
|
Which of the following is an example of a gross-motion device? A) Microphone B) Loudspeaker C) Electric motor D) Electromagnetic relay |
Card: 3 / 40 |
|
|
C) Electric motor |
Card: 4 / 40 |
|
|
True or False: In generating action, the rotor is driven by an external prime mover. |
Card: 5 / 40 |
|
|
True |
Card: 6 / 40 |
|
|
Fill in the blank: In an electromechanical energy conversion device, the total input energy is equal to the sum of energy dissipated, energy stored, and ______. |
Card: 7 / 40 |
|
|
Useful output energy |
Card: 8 / 40 |
|
|
Riddle: I produce torque when currents flow through conductors in a magnetic field. What am I? |
Card: 9 / 40 |
|
|
An electric motor |
Card: 10 / 40 |
|
|
What phenomenon occurs when a conductor moves in a magnetic field? |
Card: 11 / 40 |
|
|
An EMF is induced in the conductor. |
Card: 12 / 40 |
|
|
Which equation represents the energy balance for motoring action? |
Card: 13 / 40 |
|
|
[Electrical energy input] = [Energy dissipated in electrical losses] + [Energy stored in coupling medium] + [Mechanical energy output] |
Card: 14 / 40 |
|
|
Fill in the blank: A doubly-excited system consists of two independent coils producing a magnetic field, commonly found in ______. |
Card: 15 / 40 |
|
|
Synchronous machines |
Card: 16 / 40 |
|
|
True or False: A singly excited system has two coils for excitation. |
Card: 17 / 40 |
|
|
False. A singly excited system has only one coil to produce the desired excitation. |
Card: 18 / 40 |
|
|
What type of torque is produced in a singly excited system? |
Card: 19 / 40 |
|
|
Reluctance torque or saliency torque. |
Card: 20 / 40 |
|
|
 Unlock all Flashcards with EduRev Infinity Plan Starting from @ ₹99 only
|
|
|
|
MCQ: What defines a doubly-excited system? A) One coil B) Two independent coils C) No coils D) Variable resistance |
Card: 21 / 40 |
|
|
B) Two independent coils |
Card: 22 / 40 |
|
|
Riddle: I can be converted into energy, yet I can never be created or destroyed. What principle am I illustrating? |
Card: 23 / 40 |
|
|
The principle of conservation of energy |
Card: 24 / 40 |
|
|
What is the role of the magnetic field in electromechanical energy conversion? |
Card: 25 / 40 |
|
|
It acts as a coupling medium between electrical and mechanical systems. |
Card: 26 / 40 |
|
|
Fill in the blank: The power expressions for the two coils can be derived from the instantaneous voltage equations by applying ______. |
Card: 27 / 40 |
|
|
Kirchhoff's Voltage Law (KVL) |
Card: 28 / 40 |
|
|
True or False: In a doubly-excited system, the inductance values are independent of the rotor position. |
Card: 29 / 40 |
|
|
False. The inductance values are dependent on the position of the rotor angle. |
Card: 30 / 40 |
|
|
What is the energy stored in the magnetic field dependent on? |
Card: 31 / 40 |
|
|
The inductance and values of current at that instant. |
Card: 32 / 40 |
|
|
MCQ: Which of the following is NOT a type of electromechanical energy conversion device? A) Generator B) Motor C) Transformer D) Microphone |
Card: 33 / 40 |
|
|
C) Transformer |
Card: 34 / 40 |
|
|
Riddle: I can transform energy from motion to electricity; I am often driven by forces. What am I? |
Card: 35 / 40 |
|
|
A generator |
Card: 36 / 40 |
|
|
What happens to the current in the rotor conductors during generating action? |
Card: 37 / 40 |
|
|
An EMF is induced in the rotor conductors, causing current to flow. |
Card: 38 / 40 |
|
|
Which of the following statements is true regarding electromechanical energy conversion? A) It only converts mechanical energy to electrical energy. B) It requires a magnetic field as a coupling medium. C) It cannot store energy. D) It operates without any electrical input. |
Card: 39 / 40 |
|
|
B) It requires a magnetic field as a coupling medium. |
Card: 40 / 40 |
|
|
Completed! Keep practicing to master all of them. |
Restart
|
