Question

which will happen to the value of earth resistance if length of the earth pipe is increased​

Answer 1

The value of earth resistance will increase when length of earth pipe is increased.

Explanation:

• Earth resistance is the resistance between the electrode and point of zero potential.

• We know that $\bold{R=\rho\frac{ L}{A}}$, where R = resistance, $\rho$= resistivity, L= length and A= cross sectional area.
• From the above expression we get that $\bold{R\propto L}$ and $\bold{R\propto \frac{1}{A} }$.
• Since resistance is proportional to length, hence resistance will increase when length increase.
• From the above points we can conclude that, when length of earth pipe is increased the earth resistance will also increase.