A student carries out an experiment and plots the `V-I` graphs of three samples of nichrome wire with resistances `R_1,R_2 and R_3` respectively, (Fig. 3.41). Which of the following is true ?

Options

A. `R_(1) = R_(2) = R_(3)`
B. `R_(1) gt R_(2) gt R_(3)`
C. `R_(3) gt R_(2) gt R_(1)`
D. `R_(2) gt R_(3) gt R_(1)`

Answer

C

Explanation

While performing an experiment, a student plot V - I graph of three samples of nichrome wire with resistances `R_(1), R_(2) "and" R_(3)`. And we know that slope of V and I tells about the resistance and (slope of V and I) `prop (1)/("Resistance")`
i.e.,

So, `R_(3) gt R_(2) gt R_(1)`