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प्रश्न
What are the special features of commercial electric motors?
उत्तर
Special features of commercial electric motors are:
The coil is wound on a soft iron core; therefore, the strength of magnetic field increases.
The coil contains large number of turns of insulated copper wire.
A powerful electromagnet is used in place of permanent magnet.
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संबंधित प्रश्न
What is the role of the split ring in an electric motor?
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.
Armature
Label the four parts of an electric motor
What is the function of a commutator in an electric motor made ?
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.
Electric motors are devices that convert electrical energy into mechanical energy.
How can the speed of rotation of a coil be increased? Write at least three methods.
