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प्रश्न
Tell the odd one out. Give proper explanation.
Loud speaker, Microphone, Electric motor, Magnet.
पर्याय
Loud speaker
Microphone
Electric motor
Magnet
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उत्तर
Magnet
Explanation:
Others devices are based on the phenomenon of electromagnetism while the magnet is not.
APPEARS IN
संबंधित प्रश्न
Draw figure ‘Electric motor’ and working
Name any four appliances where electric motor is used.
What is the role of the split ring in an electric motor?
State whether the following statement is true or false.
An electric motor converts mechanical energy into electrical energy.
Explain the construction and working of an electric motor.
Explain the function of the following parts of an electric motor.
Split ring
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?
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.
What is the principle of an electric motor?
What is an electric motor? With the help of a labelled diagram, describe the working of a simple electric motor
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.
Name some of the devices in which electric motor are used.
Draw a labelled diagram of an electric motor.
Electric motors 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.
- The construction shown in the figure is of which device?
- Explain the principle on which this device works.
- Write any three uses of this device.
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.
An electric motor is a device which transforms ____________.
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?
How can the speed of rotation of a coil be increased? Write at least three methods.
