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The voltage - current (V-1) graphs for a...

The voltage - current (V-1) graphs for a metallic conductor at two different temperatures `T_1 and T_2` are shown below:

At which temperature is the resistance higher?

Text Solution

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At temperature `T_1`.
Because, the slope `((DeltaV)/(DeltaI))` of the graph i.e., its resistance is greater at `T_1`.
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KUMAR PRAKASHAN-ELECTRICITY-OBJECTIVE QUESTIONS AND ANSWERS (Answer the following questions as directed (Miscellaneous):)
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  2. A wire of given length is doubled on itself and this process is repeat...

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  4. 400 J of heat is produced in 4 s in a 4.0ohm resistor. Find the potent...

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  5. What is the commercial unit of electrical energy?

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  6. On what principle is an electric bulb based?

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  7. In a circuit, two resistors of resistances 5 Omega and 10 Omega are co...

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  8. Write the reletion between resistance R of the filament of a bulb, its...

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  11. How does the resistance (R) of a wire depend upon its radius (r)?

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  13. In a voltmeter there are 20 divisions between 0 mark and 0.5 V mark....

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  14. To verify the Ohm.s law a circuit diagram was drawn by a student as sh...

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  15. Four students connect 4 cells of 1.5 V each to get a battery of voltag...

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  16. Which of the following statements is correct? (a) one volt is one j...

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  17. Keeping the resistance constant, the potential difference applied acro...

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  18. Keeping the potential difference constant, the resistance of a circuit...

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  19. A potential difference of 10 V is needed to make a current of 0.02 A f...

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