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प्रश्न
State the principle of a D. C. motor.
उत्तर
It is based 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. The direction of the force is obtained with the help of Fleming’s left hand rule.
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संबंधित प्रश्न
What is an electromagnet?
State the two properties of the magnetic lines of force around a circular coil.
Describe a simple Experiment to demonstrate that there Exists a magnetic field around a current-carrying conductor.
How does a magnetic field set up by a solenoid change when number of turns are increased?
Why is soft iron generally used as the core of the electromagnet?
State three factors which govern the speed of rotation of an electric motor.
State the factors that can increase the speed of rotation of the coil in 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 an the coil is maximum.
State important properties (or characteristics) of magnetic lines of force around a straight conductor.
State the function of a split ring in D.C. motor.
