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CBSE Notes 2011-2012

Resistance R of a wire depends on resistivity p, length I and area of cross-section A. When the temp...

Multiple choice question

Resistance R of a wire depends on resistivity p, length I and area of cross-section A. When the temperature is altered such that the length is doubled and resistivity becomes 2p, the resistance becomes,

unknown

R

unknown

2R

unknown

4R

unknown

8R