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प्रश्न
State the energy change that takes’place in a D. C. motor.
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उत्तर
The energy change that takes place in a D. C. motor is from electrical energy into mechanical energy.
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संबंधित प्रश्न
You are given an iron nail, a torch cell, and a long piece of insulated copper wire. With the help of a labelled neat diagram, describe in steps how you will make the nail, an electromagnet.
Show with the aid of a diagram how a wire is wound on a U-shaped piece of soft iron in order to make it an electromagnet. Complete the circuit diagram and label the poles of the electromagnet.
What is an electromagnet?
Fill in the blanks by writing (i) Only soft iron, (ii) Only steel, (iii) Both soft-iron and steel for the material of core and/or magnet.
Electric bell ______.
State the condition when an electric charge can give rise to a magnetic field.
State two advantages of an electromagnet over a bar magnet.
State the principle 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 an the coil is maximum.
What are the factors that govern the magnitude of force acting on a current carrying conductor which is freely suspended in a magnetic field?
State and explain Maxwell’s Cork Screw Rule.
