p7 electric motors Flashcards
What is the primary function of an electric motor?
To convert electrical energy into mechanical energy.
True or False: Electric motors can only operate on direct current (DC).
False
Fill in the blank: An electric motor operates based on the interaction between a magnetic field and __________.
an electric current
What are the main components of an electric motor?
Stator, rotor, and commutator.
Which type of electric motor is commonly used in household appliances?
AC induction motor.
Multiple Choice: What does the term ‘torque’ refer to in the context of electric motors? A) Speed, B) Force that causes rotation, C) Electrical resistance
B) Force that causes rotation
What is the role of the commutator in a DC motor?
To reverse the direction of current flow, allowing continuous rotation.
True or False: The speed of an electric motor can be controlled by varying the voltage supplied.
True
What effect does increasing the current have on the torque produced by an electric motor?
It increases the torque.
Fill in the blank: The __________ is the stationary part of an electric motor.
stator
What is the primary advantage of using a brushless motor?
Reduced wear and maintenance due to the absence of brushes.
Multiple Choice: Which of the following is NOT a type of electric motor? A) Stepper motor, B) Synchronous motor, C) Hydraulic motor
C) Hydraulic motor
What is back EMF in the context of electric motors?
The voltage generated by a motor that opposes the applied voltage.
True or False: The rotor is the part of the motor that rotates.
True
What is the purpose of using gears in conjunction with an electric motor?
To increase torque or change the speed of the output.
