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(a) What is an electric motor ? With the...

(a) What is an electric motor ? With the help of a labelled diagram, describe the working of a simple electric motor.

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PEARSON IIT JEE FOUNDATION-ELECTROMAGNETISM-CONCEPT APPLICATION ( LEVEL 2)
  1. (a) What is an electric motor ? With the help of a labelled diagram, d...

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  2. Why is electrical energy transmitted at high voltage from a distant po...

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  3. A magnetic needle placed near a current carrying conductor deflects du...

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  4. Can we use Ampere's right hand rule to determine the deflection o...

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  5. A straight conductor carrying current produces a magnetic field around...

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  6. A transformer has 250 primary turns and 500 secondary turns. If 200 V ...

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  7. What happens if earthing is not proper in a telegraph ?

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  8. What causes the rectangular coil in a D.C. motor to rotate? Explain.

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  9. Two, current carrying conductors are placed parallel to each other. E...

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  10. Can a galvanometer as such be used for measuring the current? Explain.

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  11. A straight conductor carrying current produces a magnetic field around...

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  12. The frequency of sinusoidal A.C. voltage is 50 Hz. How many times does...

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  13. In an electromagnetic induction, what is the source of electric energy...

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  14. Two wires, A and B are placed parallel to each other in a vertical pla...

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  15. A spring made of copper is moved towards a stationary bar magnet. What...

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  16. How do you locate a current-carrying wire concealed in a wall?

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  17. Can we a transformer be used to step up or step down a D.C. voltage? E...

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  18. A magnet is dropped vertically downwards along the axis of the Alumini...

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  19. To detect electric current using a galvanoscope, the plane of the coi...

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  20. By increasing the number of turns in the coil, the strength of the mag...

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  21. Why are magnets with concave shaped poles used in a D.C. motor? What...

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