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Calculate the length of a wire of diamet...

Calculate the length of a wire of diameter 1 mm needed to prepare a coil of resistance 25 ohm. The resistivity of the material of the wire is `3.14 times 10^(-7) Omega.m`.

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NAVNEET PUBLICATION-CURRENT ELECTRICITY-EXERCISE
  1. A wire has length 10 m and resistance 20 Omega If the resistivity of t...

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  2. If the resistance of wire A is three times the resistance of wire B an...

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  3. Calculate the length of a wire of diameter 1 mm needed to prepare a co...

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  4. Two wires have lengths in the ratio 1 : 9 and diameters in the ratio 1...

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  5. A wire of resistance 1000 Omega is uniformly stretched so that its len...

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  6. Find the effective resistance of the series . combination of three res...

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  7. Choose the correct alternative and write it along its allotted alphabe...

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  8. Find the effective resistance of the parallel combination of three res...

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  9. Four resistors of resistances 5 Omega each are connected in parallel. ...

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  10. If two resistors are connected in series, the total resistance is 100 ...

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  11. If two resistors connected in parallel, the effective resistance of th...

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  12. How will you connect three resistors of resistances 3 Omega each to ob...

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  13. How will you connect three resistors (A=2 Omega), (B=3Omega) and (C =6...

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  14. How will you connect three resistors (A=4 Omega), (B=6Omega) and (C=2O...

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  15. Find the effective resistance between A and B.

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  16. Find the effective resistance between A and B.

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  17. Find the total resistance and current in the circuit.

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  18. Two resistors of resistance 20 Omega and 30 Omega are connected in ser...

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  19. Find the potential difference across each resistor in the following ci...

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  20. Find the total current in the circuit when the key K(2) is (i) open (i...

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