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Statement I : An alloy like manganin or...

Statement I : An alloy like manganin or German silver is used , instead of copper , as the materinal of the wire of a metre bridge .
Statement II : The temperature coefficient of reistance is very low for alloys .

A

Statement I is true ,statement II is true , statement II is a correct explaination for statement I.

B

Statement I is true , statement II is true , statement II is not a correct explanation for statement I.

C

Statement I is true , statement II is false .

D

Statement I is false , statement II is true .

Text Solution

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The correct Answer is:
B
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The metre wire of a metre bridge is made of mangnin or german silver , but is never made of copper . Why ?

This question has Statement l and Statement II. Of the four choices given after the Statements, choose the one that best describes the two Statements. Statement I : The drift velocity of electrons in a metallic wire decreases when temperature of the wire is increased. Statement - II : On increasing temperature, conductivity of metallic wire decreases. (1) Statement - I true, Statement - II is true, Statement - II is a correct explanation of Statement -I (2) Statement -I is true, Statement -II is true, Statement - H is not a correct explanation of Statement -1. (3) Statement - I : is true, Statement - II is false. (4) Statement -1 is false, Statement - II true. (5) Statement - I is false, Statement - II false.

Knowledge Check

  • This question has Statement I and Statement II. Of the four choices given after the Statements, choose the one that best describes the two Statements. Statement -I: Sudden expansion of ideal gases from high pressure to low pressure, will not show any temperature change. Statement - II : Intermolecular force and joule- Thomson coefficient of ideal gases is zero.

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    B
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    C
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    B
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    C
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    D
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