English
Maharashtra State BoardSSC (English Medium) 10th Standard

Tell the odd one out. Give a proper explanation. Loud speaker, Microphone, Electric motor, Magnet

Advertisements
Advertisements

Questions

Tell the odd one out. Give a proper explanation.

Find the odd one out and give its explanation.

Options

  • Loud speaker

  • Microphone

  • Electric motor

  • Magnet

MCQ
Odd One Out
Advertisements

Solution

Magnet

Explanation:

A standard magnet is a material that permanently produces its own magnetic field without needing an external power source. In contrast, loudspeakers, microphones, and electric motors are all devices that specifically rely on the principles of electromagnetism to function. Because those three convert between electrical and mechanical energy using electromagnetic fields, the simple magnet stands as the odd one out.

shaalaa.com
  Is there an error in this question or solution?
Chapter 4: Effects of electric current - Exercises [Page 60]

APPEARS IN

Balbharati Science and Technology Part 1 [English] Standard 10 Maharashtra State Board
Chapter 4 Effects of electric current
Exercises | Q 1.3 | Page 60
SCERT Maharashtra Science and Technology Part 1 [English] Standard 10 Maharashtra State Board
Chapter 4 Effects of electric current
Find odd one out. | Q 1. | Page 12

RELATED QUESTIONS

Draw figure ‘Electric motor’ and working 


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

Armature 


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

Brushes


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

Split ring


Label the four parts of an electric motor


Electric motor works on the magnetic effect of electric current.


State whether the following statement is true or false:
An electric motor converts mechanical energy into electrical energy.


What is the other name of the split ring used in an electric motor?


What is the function of a commutator in 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.


 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? 


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

 


An electric motor is a device which transforms: 

mechanical energy to electrical
 heat energy to electrical energy
 electrical energy to heat energy only
 electrical energy to mechanical energy


Study the following principle and answer the question.
A force is excreted on the current carrying conductor. The direction of this force depends on both the direction of the current and the direction of the magnetic field. This force is maximum when the direction of current is perpendicular to the direction of the magnetic field.
a) By which law we can determine the direction of force excreted on the current carrying conductor.
b) In which electrical equipment this principle is used.
c) Draw a diagram representing construction of this equipment.
d) Write the working of this equipment in brief.


Electric motor : converts electrical energy into mechanical energy : : Electric generator : _______


Right or wrong sentence.

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


What is an electric motor?


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.

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.


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.


The most suitable material for making permanent magnets is ______.


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×