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प्रश्न
principle of an electric motor ?
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उत्तर
Principle: An electric motor (dc motor) works on the principle that when an electric current is passed through a conductor placed normally in a magnetic field, a force acts on the conductor as a result of which the conductor begins to move and mechanical energy is obtained.
संबंधित प्रश्न
Suppose you are given a long bar magnet and you are asked to break it into four small magnets. Draw diagrams showing the polarities of each broken part.
State three uses of an electromagnet?
State two differences between an electromagnet and a permanent magnet.
State the purpose of the iron core.
State three factors which govern the speed of rotation of an electric motor.
What energy conversion takes place during the working of a d c motor?
State the position of armature coil relative to the direction of magnetic field, in a D. C. motor when the deflecting couple acting and the coil is minimum.
What is dynomo (a.c. generator)? State the principle on which it works.
Point out three differences between an electromagnet and a bar (or permanent) magnet.
State the function of a split ring in D.C. motor.
