# resist.cone: Calculate resistance of a truncated conical conductor In breakage: SICM pipette tip geometry estimation

## Description

Calculates the resistance of a truncated conical volume of material of known resistivity.

## Usage

 `1` ```resist.cone(l, r1, r2, rho = 51) ```

## Arguments

 `l` Length of the truncated cone, in microns. `r1` Radius of one end of the truncated cone, in microns. `r2` Radius of the other end of the truncated cone, in microns. `rho` Resistivity of the conductive material, in ohm centimetres. The default value of 51 ohm cm corresponds to a 150 mM solution of KCl.

## Value

Calculated resistance, in ohms.

## Note

A `NaN` result will be produced if `r1==r2`.

## Author(s)

Matthew Caldwell

`resist.access`, `resist.total`, `resist.breakage`

## Examples

 ```1 2 3 4``` ```# resistance of truncated conical segment 30 microns long, with end radii 50nm and 500nm # filled with solution of resistivity 64 ohm cm # converting result from ohms to megohms for readability resist.cone(l=30, r1=0.05, r2=0.5, rho=64) * 1e-6 ```

### Example output

```Loading required package: Imap
[1] 244.462
```

breakage documentation built on May 1, 2019, 11:30 p.m.