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Explain why resistance coils are usually...

Explain why resistance coils are usually double wound.

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PHYSICS GALAXY - ASHISH ARORA-ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENT-Discussion Question-
  1. A cylindrical bar magnet is kept along the axis of coil. Will there be...

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  2. The element of an electric heater is in the form of a coil. Once it is...

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  3. Consider the self-inductance per unit length of a solenoid at its cen...

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  4. A capacitor only is connected to an AC source. What will be the phase ...

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  5. What is the maximum value of power factor ? When does it occur ?

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  6. A copper ring is suspended in a vertical plane by a thread. A stell ba...

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  7. For tuning radio for various stations, we change the capacitance of an...

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  8. Explain why resistance coils are usually double wound.

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  9. A current from A to B is increasing in magnitude. What is the directio...

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  10. Can a transformer be used to alter DC voltage?

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  11. A pure inductance is connected to an AC source. What will be the phase...

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  12. Dynamo core is laminated because

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  13. A copper ring and a wooden ring of same dimension are placed so that t...

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  14. Three indentical closed coils A,B and C are placed with their planes p...

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  15. The resistance of a coil for direct current is 10 Omega. An alternatin...

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  16. A copper ring is held horizontally and a bar magnet is dropped through...

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  17. A bulb and a capacitor are connected in series to an a.c. source of va...

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  18. A body is suspended from the lower end of a vertical spring. What shal...

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  19. Faraday's laws are consequency of conservation of

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  20. An artificial satellite with a metal surface is orbiting the earth aro...

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