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

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

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A battery (consisting of one or more electric cells) is used to maintain s potential difference across a conductor.
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(a) Name a device which helps to maintain potential difference across a conductor (say, a bulb). (b) If a potential difference of 10V causes a current of 2A to flow for 1 minute, how much energy is transferred?

(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?

Discuss the principle of potentiometer and explain the determination of potential difference across a conductor using a potentiometer.

PRADEEP-ELECTRICITY-NCERT Question
  1. Define the unit of current.

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

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  3. Name a device that helps to maintain a potiontial difference across a ...

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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. Use the data in Table 3.1 to answer the following : (a) Which among ...

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

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  12. Redraw the circuit of Q.12, putting in an ammeter to measure the curre...

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

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  14. An electric lamb of 100 Omega, a toaster of resistance 50 Omega and a ...

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

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

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  17. What is : (a) the highest (b) the lowest total resistances that ca...

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

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

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

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