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Conductivity and Resistivity

A student car...

Question

A student carries out an experiment and plots the V-I graph of three samples of Nicrome wire with resistance $R_{1}, R_{2}$ and $R_{3}$ respectively. Which ofeth following is true?

R_{1} = R_{2} = R_{3}

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R_{1} > R_{2} > R_{3}

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R_{3} > R_{2} > R_{1}

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R_{2} > R_{3} > R_{1}

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Solution

The correct option is A $R_{3} > R_{2} > R_{1}$
Slope of I-V graph $= \frac{1}{R} = t a n θ$ . Slope is less for $R_{3}$ , so option three is correct.

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Similar questions

\frac{R_{1}}{r_{1}} + \frac{R_{2}}{r_{2}} + \frac{R_{3}}{r_{3}} =

△ A B C

a < b < c

r

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r < r_{1} < r_{2} < r_{3}

△ A B C, r_{1} r_{2} + r_{2} r_{3} + r_{3} r_{1} = \frac{r_{1} r_{2} r_{3}}{r}

Δ

r_{1} + r_{2} + r_{3} - r = 4 R

r_{1} r_{2} + r_{2} r_{3} + r_{3} r_{1} = Δ^{2}

△ A B C, r_{1} r_{2} + r_{2} r_{3} + r_{3} r_{1}

r_{1}, r_{2}

r_{3}

2 s

(a \times 2 a \times 4 a)

R_{1}

R_{2}

R_{3}

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