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The resistance of a platinum wire of pla...

The resistance of a platinum wire of platinum resistance thermometer at the ice point is `5 Omega` and at steam point is `5.23 Omega`. When therometer is insertes in a hot bath, the resistance of the platinum wire is `5.795 Omega`. Calculate the temperature of the bath?

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To solve the problem, we will use the formula that relates the resistance of a platinum wire to temperature. The resistance at any temperature \( T \) is given by: \[ R_T = R_0 \left(1 + \alpha T\right) \] Where: - \( R_T \) is the resistance at temperature \( T \) ...
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NCERT ENGLISH-CURRENT ELECTRICITY-All Questions
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  8. A battery of emf 10 V and internal resistance 3 Omega is connected to...

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  9. (a) Three resistors 1 Omega, 2Omega and 3 Omega are combined in series...

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  10. (a) Three resistors 2 Omega, 4 Omega and 5 Omega are combined in paral...

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  11. At room temperature (27.0^@C) the resistance of a heating element is 1...

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  12. A negligibly small current is passed through a wire of length 15 m and...

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  13. A silver wire has a resistance of 2.1 Omega at 27.5^@C, and a resistan...

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  14. Determine the current in each branch of the network shown in fig.

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  15. (i) In a metre bridge, the balance point is found to be at 39.5 cm fro...

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  16. A storage battery of emf 8.0 V and internal resistance 0.5 Omega is be...

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  17. In a potentiometer arrangement, a cell of emf 1.25 V gives a balance p...

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  18. The number density of free electrons in a copper conductor is estimate...

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  19. The earth's surface has a negative surface charge density of 10^(-9) C...

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  20. What conclusion can you draw from the following observations on a resi...

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