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The resistance of a platinum wire at a p...

The resistance of a platinum wire at a point ` 0 ^@ ` C is 5.00 ohm and its resistance at steam point is 5.40 ` Omega `. When the wire is immersed in a hot oil bath, the resistance becomes `5.80 Omega`. Calculate the temperature of the oil bath and temperature coefficient of resistance of platinum.

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To solve the problem, we need to use the formula for resistance in relation to temperature: \[ R_T = R_0 (1 + \alpha T) \] where: - \( R_T \) is the resistance at temperature \( T \), - \( R_0 \) is the resistance at 0°C, - \( \alpha \) is the temperature coefficient of resistance, ...
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CBSE COMPLEMENTARY MATERIAL-ELECTROSTATICS AND CURRENT ELECTRICITY -NUMERICALS
  1. In the following arrangement of capacitors, the energy stored ...

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  2. The charge passing through a conductor in a function of time an...

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  3. The resistance of a platinum wire at a point 0 ^@ C is 5.00 ohm and ...

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  4. Three identical cells, each of emf 2V and internal resistance 0.2 ohm,...

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  5. Calculate the equivalent resistance and current shown by the ammeter i...

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  6. A storage battery of emf 12V and internal resistance of 1.5 Omega is...

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  7. Three cells are connected in parallel, with their like poles connected...

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  8. A 16 ohm resistance wire is bent to form a square. A source of emf 9 v...

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  9. A length of uniform ‘heating wire’ made of nichrome has a resistance 7...

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  10. With a certain unknown resistance X in the left gap and a resistance o...

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  11. Figure show a potentiometer circuit for comparison of two resistances....

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  12. In a potentiometer, a standard cell of emf 5V of negligible internal r...

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  13. Potential difference across terminals of a cell are measured (in volt)...

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  14. Four cells each of internal resistance 0.8 Omega and emf 1.4 V, d a...

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  15. In the figure, an ammeter A and a resistor of resistance R = 4 Omega ...

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  16. In the circuit shown, the reading of voltmeter is 20V. Calculate resis...

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  17. (i) Calculate Equivalent Resistance of the given electrical network b/...

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  18. A potentiometer wire AB of length 1m is connected to a driver cell of ...

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  19. A battery of emf 10 v and internal resistane 3 Omega is connected to ...

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  20. A network of resistance is connected to a 16V battery with internal re...

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