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  • A student carries out an experiment and plots the V-I graph of three samples of nichrome wire with resistances R1, R2 and R3 respectively (Figure.12.5). Which of the following is true? (a) R1 = R2 = R3(b) R1 > R2 > R3(c) R3 > R2 > R1(d) R2 > R3 > R1

A student carries out an experiment and plots the V-I graph of three samples of nichrome wire with resistances R1, R2 and R3 respectively (Figure.12.5). Which of the following is true? 

(a) R1 = R2 = R3 

(b) R1 > R2 > R3 

(c) R3 > R2 > R1 

(d) R2 > R3 > R1 

Answers (1)

Slope of Current vs Voltage graph is proportional to 1/R

(where R is resistance)

So, line with highest slope has least resistance due to the inverse proportional relation. Hence,

R3>R2>R1

Therefore, option (c) is correct.

Posted by

infoexpert24

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