Question

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. Which of the following is true? 

Options

• R₁ = R₂ = R₃

• R₁ > R₂ > R₃

• R₃ > R₂ > R₁ 

• R₂ > R₃ > R₁ 

Answer 1

R₃ > R₂ > R₁ 

Explanation - 

Since the current (I) is plotted on y-axis and potential difference (V) is plotted on x-axis, so the slope of the graph is `1/"R"`. It means higher the slope, the lesser is the resistance. So, R₁ will be minimum and R₃ will be maximum.