JEE MAIN - Physics (2025 - 22nd January Morning Shift - No. 16)
Which of the following resistivity ( $\rho$ ) $\mathrm{v} / \mathrm{s}$ temperature ( T ) curves is most suitable to be used in wire bound standard resistors?
_22nd_January_Morning_Shift_en_16_1.png)
_22nd_January_Morning_Shift_en_16_2.png)
_22nd_January_Morning_Shift_en_16_3.png)
_22nd_January_Morning_Shift_en_16_4.png)
Explanation
We use Nichrome, manganin and constantan to make standard (reference) wire bound resistors their resistivity is less dependent on temperature. So $\rho$ vs T curve will not show any sharp change.
_22nd_January_Morning_Shift_en_16_5.png)
Hence, option 4 is correct.
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