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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.
संबंधित प्रश्न
Name the material used for making the armature of an electric bell. Give a reason for your answer.
principle of an electric motor ?
Name the material of core in (a) an electric bell, (b) electromagnet, (c) a d.c. motor, (d) an a.c. generator and (e) a transformer.
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 purpose of the iron core.
What is a permanent magnet? Give one use of it.
State two advantages of an electromagnet over a bar magnet.
State the principle of a D. C. motor.
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Iron is to be separated from trash.
