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A student carries out an experiment and ...

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 ?

A

`R_(1)=R_(2)=R_(3)`

B

`R_(1)gtR_(2)gtR_(3)`

C

`R_(3)gtR_(2)gtR_(1)`

D

`R_(2)gtR_(3)gtR_(1)`

Text Solution

Verified by Experts

The correct Answer is:
C
Slope of `(I)/(V )prop(1)("Resistance" )`
It means when slope will be maximum, then resistance will be minimum. From the figure, we can see that, slope of `R_(1)` is maximum, hence its resistance will be minimum. As, slope of `R_(3)` is minimum so, its resistance will be maximum. Therefore, `R_(3) gt R_(2) gt R_(1)`
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