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Resistance of a metal wire of length 1 m...

Resistance of a metal wire of length 1 m is `26 Omega` at `20^@ C`. If the diameter of the wire is `0.3 mm`, what will be the resistivity of the metal at that temperature ? .

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To find the resistivity of the metal wire, we will use the formula for resistance in terms of resistivity, length, and cross-sectional area: \[ R = \frac{\rho L}{A} \] Where: - \( R \) = Resistance (in ohms, \( \Omega \)) ...
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NCERT ENGLISH-ELECTRICITY-Exercise
  1. Resistance of a metal wire of length 1 m is 26 Omega at 20^@ C. If the...

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  2. What does an electric circuit mean ?

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  3. Define the unit of current.

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

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

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

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

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

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

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

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

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  12. Use the data in Table 12.2 to answer the following - (a) Which among ...

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

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

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

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

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

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

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

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

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

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