English
Maharashtra State BoardSSC (English Medium) 10th Standard

What is an electric motor?

Advertisements
Advertisements

Question

What is an electric motor?

One Line Answer
Advertisements

Solution

Electric motor is a device which converts electrical energy into mechanical energy.

shaalaa.com
  Is there an error in this question or solution?
Chapter 4: Effects of electric current - Solve the following Questions [Page 27]

APPEARS IN

SCERT Maharashtra Science and Technology Part 1 [English] Standard 10 Maharashtra State Board
Chapter 4 Effects of electric current
Solve the following Questions | Q 4 (i) | Page 27

RELATED QUESTIONS

Draw figure ‘Electric motor’ and working 


What is the Principle of an Electric motor?


Name any four appliances where electric motor is used.


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


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

Armature 


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

Brushes


Label the four parts of an electric motor


Electric motor works on the magnetic effect of electric current.


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


Name the device which is used to reverse the direction of current in the coil of a motor?


What is the function of a commutator in an electric motor made ? 


Of what substance are the brushes of an electric motor made?


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: 

 Fleming's Rule for the motor effect uses the .......... hand.


 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:  

 both current and magnetic field were reversed simultaneously. 

 


In an electric motor, the direction of current in the coil changes once in each: 
 two rotations
 one rotation
 half rotation
 one-four rotation

 


Tell the odd one out. Give a proper explanation.


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


Right or wrong sentence.

Electro chemicals are devices that convert electrical energy into mechanical energy.


In which electric motor appliances do we use it?


Observe the figure and write the answers to the questions asked.

  1. The construction shown in the figure is of which device?
  2. Explain the principle on which this device works.
  3. Write any three uses of this device.

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

A generator converts mechanical energy into electrical energy.


An electric motor is a device which transforms ____________.


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 ____________.


Material of the core of a strong magnet is ____________.


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?


Draw an appropriate schematic diagram showing common domestic circuits and discuss the importance of fuse. Why is it that a burnt out fuse should be replaced by another fuse of identical rating?


How can the speed of rotation of a coil be increased? Write at least three methods.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×