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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)

Hence, the correct answer is option (c).

Explanation:-

To determine which of the options is true regarding the resistances R1, R2, and R3? based on the V-I graph (Voltage-Current graph) for the three samples of nichrome wire, we need to understand the relationship between voltage V, current I, and resistance R.

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

(where R is resistance)

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

R3>R2>R1

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