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प्रश्न
What is an electric motor?
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उत्तर
Electric motor : An electric motor is a device which converts the electrical energy into the mechanical energy.
संबंधित प्रश्न
The diagram shows a coil wound around a U shape soft iron bar AB.
1) What is the polarity induced at the ends A and B when the switch is pressed?
2) Suggest one way to strengthen the magnetic field in the electromagnet
3) What will be the polarities at A & B if the direction of current is reversed in the circuit?
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 two factors on which the magnitude of an induced e.m.f. in the secondary coils of a transformer depends.
What is an electromagnet?
State the purpose of the iron core.
State the principle of a D. C. motor.
State important properties (or characteristics) of magnetic lines of force around a straight conductor.
Point out three differences between an electromagnet and a bar (or permanent) magnet.
Write the answer in your word.
How is an electromagnet made?
