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प्रश्न
State what would happen to the direction of rotation of a motor if:
In what ways can a motor be made more powerful?
उत्तर
We can make a motor more powerful by following ways:
If the coil is wound on a soft iron core, the strength of magnetic field increases.
By increasing the number of turns of insulated copper wire of the coil
By using a powerful electromagnet in place of permanent magnet
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संबंधित प्रश्न
Name any four appliances where electric motor is used.
Name some devices in which electric motors are used
What is the other name of the split ring used 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 .......... .
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?
Tell the odd one out. Give proper explanation.
Loud speaker, Microphone, Electric motor, Magnet.
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.
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.
Observe the following diagram and answer the questions.
- Construction of which equipment does the above diagram show?
- On which principle does this equipment work?
- According to which law the coil ABCD rotates?
- Write the law in your own words.
- Where is this equipment used?
