English

What is the Principle of Electric motor? - Science

Advertisements
Advertisements

Questions

What is the Principle of an Electric motor?

 Write the' principle of working of an electric motor.

Answer in Brief
Advertisements

Solution 1

Principle of Electric Motor:
An electric motor works on the principle that a current-carrying conductor placed in a magnetic field experiences a force. 

shaalaa.com

Solution 2

The working principle of an electric motor is based on the magnetic effect of current. A current-carrying loop experiences a force and rotates when placed in a magnetic field. The direction of rotation of the loop is given by Fleming’s left-hand rule.

shaalaa.com
  Is there an error in this question or solution?
Chapter 13: Magnetic Effects of Electric Current - Exercises [Page 241]

RELATED QUESTIONS

Draw figure ‘Electric motor’ and working 


State whether the following statement is true or false.

An electric motor converts mechanical energy into electrical energy.


Name some devices in which electric motors are used


Explain the construction and working of an electric motor.


Explain the function of the following parts of an electric motor.

Brushes


A motor converts one form of energy into another. Name the two forms.


In an electric motor, which of the following remains fixed and which rotates with the coil?
Commutator ; Brush 


What is the role of the spilt ring in an electric motor?


Fill in the following blank with suitable words: 

 A motor contains a kind of switch called a .......... which reverses the current every half .......... .


 In a d.c. motor, why must the current to the coil be reversed twice during each rotation? 


 State what would happen to the direction of rotation of a motor if:
 the current were reversed


 State what would happen to the direction of rotation of a motor if: 

 In what ways can a motor be made more powerful? 


What is an electric motor? With the help of a labelled diagram, describe the working of a simple electric motor 

 


What are the special features of commercial electric motors? 


Which device is used to produce electricity? Describe with a neat diagram.


Name some of the devices in which electric motor are used.


Draw a labelled diagram of an electric motor.


What is an electric motor?


In which electric motor appliances do we use it?


Which of the following converts electrical energy into mechanical energy?


An electric motor converts ______.


State whether true or false. If false, correct the statement.

A generator converts mechanical energy into electrical energy.


State whether true or false. If false, correct the statement.

The speed of rotation of an electric motor can be increased by decreasing the area of the coil.


Direction of rotation of a coil in electric motor is determined by ____________.


In an electric motor, to make the coil rotating continuously in the same direction, the current is reversed in the coil after every half rotation by a device called ____________.


Commercial electric motors do not use ____________.


Draw a labelled circuit diagram of a simple electric motor and explain its working. In what way these simple electric motors are different from commercial motors?


The most suitable material for making permanent magnets is ______.


The moving part of an electric motor is called ______.


Define electric motor.


Observe the following diagram and answer the questions.

  1. Construction of which equipment does the above diagram show?
  2. On which principle does this equipment work?
  3. According to which law the coil ABCD rotates?
  4. Write the law in your own words.
  5. Where is this equipment used?

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×