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A 10 meter long wire of uniform cross se...

A `10` meter long wire of uniform cross section of `20 Omega` resistance is used as a potentiometer wire. This wire is connected in series with a battery of `5V` along with an external resistance of `480 Omega` if an unknown emf `epsilon` is balanced at `600 cm` of this wire , calculate (i) the potential gradient of the potentiometer wire and (ii) the value of the unknown emf `epsilon`.

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A 10 m long wire of uniform cross section and 20 Omega resistance is used in a potentiometer. The wire is connected in series with a battery of 5 V along with an external resistance of 480 Omega . If and unknown emf E is balanced at 6.0 m length of the wire,then the value of unknown emf is

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SL ARORA-ELECTRICAL INSTRUMENTS-Problem for self practice
  1. A 10 meter long wire of uniform cross section of 20 Omega resistance ...

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  2. A cell of emf 2 V and internal resistance 1Omega has its terminals joi...

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  3. Shown n batteries connected to form a circuit. The resistances donote ...

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  4. Two cells of emfs 1.5 V and 2.0V internall resistance 1 Omega and 2 Om...

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  5. Calculate the potential difference across the 2k Omega resistor in the...

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  6. A network of resistors is connected to a battery of negligible interna...

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  7. Calculate (i) current in the 6Omega resistor, (ii) terminal voltage ac...

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  8. Three cells are connected in parallel with their like poles connected ...

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  9. In the network shown in figure. (i) calculate the current of the 6V ba...

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  10. In the network shown in figure. Find (i) the currents I(1),I(2) and I(...

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  11. Calculate the potential difference between the junctions B and D in th...

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  12. For the network shown in the figure, the value of the current i is

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  13. What does the ammeter A read in the circuit shown in figure? What if t...

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  14. In the circuit shown in figure. Determine the current in the resistanc...

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  15. calculate the current flowing in each of the resistances of the networ...

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  16. Compute the values of i(1),i(2),i(3) and V in the circuit, shown in fi...

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  17. A certain length of a uniform wire of resistance 12Omega is bent into ...

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  18. find the emf (epsi(0)) and internal resistance (r(0)) if a battery whi...

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  19. In figure. ABCDA is a uniform circular wire of resistance 2Omega,AOC a...

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  20. Three batteries of emf 4,5 and 6V and internal resistances 1,2 and 3Om...

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  21. One ampere of current enters the junction A of a wheatstone bridge ABC...

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