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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
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?
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.
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Answer the following in short.
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What are the factors that govern the magnitude of force acting on a current carrying conductor which is freely suspended in a magnetic field?
