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Name a device that helps to maintain a p...

Name a device that helps to maintain a potential difference across a conductor.

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An electric cell (or a battery).
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Name a device that helps to maintain a potiontial difference across a conductor.

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(a) Name a device that helps to measure the potential difference across a conductor. (b) How much energy is transferred by 12 V power supply to each coulomb of charge which it moves around a circuit?

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LAKHMIR SINGH & MANJIT KAUR-ELECTRICITY -Exercise
  1. Define the unit of current.

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  2. Calculate the number of electrons consituting one coulomb of charge.

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  3. Name a device that helps to maintain a potential difference across a c...

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  4. What is meant by saying that the potential difference between two poin...

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  5. How much energy is given to each coulomb of charge passing through a 6...

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  6. On what factors does the resistance of a conductor depend ?

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  7. Will current flow more easily through a thick wire or a thin wire of t...

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  8. Let the resistance of an electrical component remain constant while th...

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  9. Why are coils of electric toasters and electric irons made of an alloy...

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  10. Draw a schematic diagram of a circuit consisting of a battery of three...

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  11. Judge the equivalent resistance when the following are connected in pa...

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  12. An electric lamp of 100 Omega, a toaster of resistance 50 Omega and a ...

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  13. What are the advantages of connecting electrical devices in parallel w...

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  14. How can three resistors of resistances 2 Omega,3 Omega, and 6 Omega be...

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  15. What is : (a) the highest (b) the lowest total resistances that can b...

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  16. Why does the cord of an electric heater not glow while the heating ele...

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  17. Compute the heat generated while transferring 96000 coulombs of charge...

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  18. An electric iron of resistance 20 Omega takes a current of 5 A. Calcul...

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  19. What determines the rate at which energy is delivered by a current ?

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  20. An electric motor takes 5 A from a 220 V line. Determine the power and...

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