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प्रश्न
What is an electric motor? With the help of a labelled diagram, describe the working of a simple electric motor
उत्तर
An electric motor is a device that converts electrical energy into mechanical energy.
Diagram: Electric motor
Working of an electric motor:
An electric motor works on the principle of magnetic effect of electric current. In an electric motor, a rectangular coil ABCD in placed between two magnets in poles N and S. Now, current is passed through it continuously. When current is passed into the coil, it produces a magnetic field around it. The two magnetic fields interact and cause the coil to rotate. When the coil rotates, the shaft attached to it also rotates. In this way, electrical energy supplied to the motor is converted into mechanical energy.
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संबंधित प्रश्न
Explain the function of the following parts of an electric motor.
Brushes
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
Tell the odd one out. Give proper explanation.
Loud speaker, Microphone, Electric motor, Magnet.
What is an electric motor?
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?
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?
