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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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Which of the following graphs correctly represents the variation of heat energy (U) produced in a metallic conductor in a given time as a function of potential difference (V) across the conductor ?

A battery of internal resistance 3Omega is connected to 20Omega resistor and the potential difference across the resistor is 10V. If another resistor 30Omega is connected in series with the first resistor and battery is again connectecl to the combination, then calculate the e.m.f and terminal potential difference across the combination..

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OSWAAL PUBLICATION-ELECTRICITY-NCERT CORNER ( Intext Questions )
  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 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 remains constant while t...

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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 12.2 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 question 1, putting in an ammeter to measure the...

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

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  14. An electric lamp of 100Omega , a toaster of resistance 50Omega, 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 2Omega,3Omegaand6Omega be conne...

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  17. What is the lowest total resistance that can be secured by combination...

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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 coulomb of charge ...

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

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