1.

The temperaturecoefficientof resistanceof tungsten is 4.5 xx10^(-3) ""^(@)C^(-1)and thatof germaniumis- 5 xx 10^(-2)""^(@)C^(-1) . A tungstenwireof resistance100 Omega isconnectedin series with a germaniumwireofresistanceR. The valueof Rfor which the resistanceof combinationdoes notchange withtemperatureis .

Answer»

`9 OMEGA`
`11 .11 Omega`
`0.9 Omega`
`111.1 Omega`

ANSWER :A


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