Question

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

Answer 1

Part a)

`\rho = 52.9 ohm- m`

Part b)

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

Step-by-step explanation:

Part a)

As we know the formula of resistance is given as

`R = \rho (L)/(A)`

here we know that

`\rho = (RA)/(L)`

here we have

`R = 2.3 M ohm`

`L = 20 cm`

`Area = (0.023)(0.20 * 10^(-3))`

`Area = 4.6 * 10^(-6) m^2`

now we have

`\rho = ((2.3 * 10^6)(4.6 * 10^(-6)))/(0.20)`

`\rho = 52.9 ohm- m`

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