Resistivity measurements on the leaves of corn plants are a good way to assess stress and overall health. The leaf of a corn plant has a resistance of 2.3 MΩ measured between two electrodes placed 20 cm apart along the leaf. The leaf has a width of 2.3 cm and is 0.20 mm thick.
Part AWhat is the resistivity of the leaf tissue?Express your answer to two significant figures and include the appropriate units.ρ=________Part BIs this greater than or less than the resistivity of muscle tissue in the human body?(A) greater or(B) less

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aristocles aristocles · Answer 1 · 2019-08-15T10:18:36+02:00

Answer:

Part a)

[tex]\rho = 52.9 ohm- m[/tex]

Part b)

the resistivity of corn plant is grater than the resistivity of muscle tissue in the human

Explanation:

Part a)

As we know the formula of resistance is given as

[tex]R = \rho \frac{L}{A}[/tex]

here we know that

[tex]\rho = \frac{RA}{L}[/tex]

here we have

[tex]R = 2.3 M ohm[/tex]

[tex]L = 20 cm[/tex]

[tex]Area = (0.023)(0.20 \times 10^{-3})[/tex]

[tex]Area = 4.6 \times 10^{-6} m^2[/tex]

now we have

[tex]\rho = \frac{(2.3 \times 10^6)(4.6 \times 10^{-6})}{0.20}[/tex]

[tex]\rho = 52.9 ohm- m[/tex]

Part b)

Resistivity of mucle tissue of human is is ranging from 15 ohm-m to 50 ohm m so here we can say that

the resistivity of corn plant is grater than the resistivity of muscle tissue in the human