resistance

IIT JEE Questions › Electricity and magnetism questions › resistance

in order to increase the resistance of a given wire of uniform cross section to 4 times it's value, a fraction of it's length is stretched uniformly till the full length of the wire becomes 3/2 times the original length.what is the value of this fraction?

a.1/4
b.1/8
c.1/16
d.1/6

#Physics #Electricity and magnetism #Electric Current

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2 Answers

466

Himanshu Giria ·2014-07-07 04:47:41

B

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Himanshu Giria 1/8
Upvote·0· Reply ·2014-07-07 04:48:11
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213

Nandikesh Singh ·2014-07-08 03:27:09

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Swastik Haldar thanks.
Upvote·0· Reply ·2014-07-08 07:01:15
parul bhalla couldnt understand d calculation part
Upvote·0· Reply ·2015-05-15 12:12:04
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