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l-V characteristic of a copper wire of l...

l-V characteristic of a copper wire of length Land area of cross-section A is shown in figure. The slope of the curve becomes

A

More if the experiment is performed at higher temperature

B

More if a wire of steel of same dimension is used

C

More if the length of the wire is increased

D

Less if the length of the wire is increased

Text Solution

Verified by Experts

Slope of V-i curve = `R =((pI))/A` But in given curve axis of i and V are interchanged. So slope of given curve `=1/R (=A/(pI)` i.e.,. with the increase in length of the wire. Slope of the curve will decrease.
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