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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 battery is a device that helps to maintain a potential difference across a conductor.
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KUMAR PRAKASHAN-ELECTRICITY-QUESTIONS AND ANSWERS (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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  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 2 to answer the following: Which is a better c...

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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 9.39, 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. Judge the equivalent resistance when the following are connected in pa...

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

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

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  17. How can three resistor of resistances 2 Omega, 3 Omega and 6 Omega b...

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  18. How can three resistor of resistances 2 Omega, 3 Omega and 6 Omega b...

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  19. What is (a) the highest, (b) the lowest total resistance that can be s...

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  20. Why does the cord of an electric heater not glow while the heating el...

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