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The resistance of a wire of 150 ""^(@)C ...

The resistance of a wire of `150 ""^(@)C` is `133 Omega`. What will be its resistance at `500 ""^(@)C`. The temperature coefficient of resistance of a wire at `0 ""^(@)C` is `0.0045 ""^(@)C^(_1)`?

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To find the resistance of the wire at a temperature of 500°C, we can use the formula that relates the resistance of a conductor to its temperature. The formula is given by: \[ R_2 = R_1 \times (1 + \alpha \Delta T) \] Where: - \( R_1 \) is the initial resistance at temperature \( T_1 \), - \( R_2 \) is the resistance at the new temperature \( T_2 \), - \( \alpha \) is the temperature coefficient of resistance, ...
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MODERN PUBLICATION-CURRENT ELECTRICITY-REVISION EXERCISES (NUMERICAL PROBLEMS)
  1. Calculate the resistivity of the material of a wire 1.0 m lomg, 0.4 mm...

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  2. A wire of resistance R is stretched to thrice its original length keep...

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  3. The resistance of a wire of 150 ""^(@)C is 133 Omega. What will be its...

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  4. A copper wire is stretched so as to increase its length by 0.2%. Calcu...

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  5. Estimate the average drift speed of conduction electrons in a copper w...

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  6. A uniform wire of resistance 12 Omega is cut into three pieces so that...

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  7. A battery of emf E and internal resistance when connected across an ex...

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  8. Three cells of emf, epsi(1) = 1.5 V, epsi(2) = 2.0 V and epsi(3) = 3.0...

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  9. A 100 W heater coil is rated 200 V. Find the resistance of thwe coil.

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  10. Two bulbs are reled (P(1),V)" and "(P(2), V). If they are connected (...

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  11. A 16 Omega resistance wire is bent to form a square. A source of emf 9...

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  12. Use Kricchoff's rules to find out the values of the current I(1) and I...

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  13. In the electric network shown in the figure use Krichhoff's rules to c...

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  14. A potentiometer wire of length 1 m is connected to a driver cell of em...

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  15. A potentiometer wire of length 1.0 m has a resistance of 10 Omega. It ...

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  16. In the circuit shown, R(1) = 4 Omega, R(2) = R(3) = 15 Omega, R(4) = 3...

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  17. In the circuit shown in the figure, find the total resistance of the c...

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  18. A resistance of R Omega draws current from a potentiometer as shown in...

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  19. For the circuit shown here, would tha balancing length increase, decre...

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  20. The potential difference applied across a given resistor is altered so...

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