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The Electrostatic System of Units (ESU)
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Description
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The electrostatic system of units (ESU) has the centimeter, gram, second, and franklin as its base units, where the franklin is energy-equivalent to the unit square root dyne centimeter ( ). For naming consistency, the franklin is called the abcoulomb.
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When used in conjunction with the UseSystem command, the electrostatic system sets the following units for the given dimensions.
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Dimension Name
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Unit Name
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length
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centimeter
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mass
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gram
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time
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second
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speed
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kyne
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acceleration
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gal
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energy
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erg
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force
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dyne
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power
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erg per second
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pressure
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barye
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electric current
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statampere
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electric charge
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statcoulomb
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electric capacitance
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statfarad
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magnetic inductance
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stathenry
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electric conductance
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statsiemens
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electric resistance
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statohm
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magnetic flux density
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stattesla
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electric potential
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statvolt
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magnetic flux
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statweber
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plane angle
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radian
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solid angle
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steradian
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Examples
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Electrostatic units can be converted to their energy equivalents.
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If infolevel is set to a greater integer (possible settings are 1 through 5), more detailed information about the computation method is displayed.
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![infolevel[Units] := 1](/support/helpjp/helpview.aspx?si=9449/file03266/math223.png)
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convert/system: "converting to the units erg/s"
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convert/system: "converting to the units statS"
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| (5) |
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![unassign('infolevel[Units]')](/support/helpjp/helpview.aspx?si=9449/file03266/math247.png)
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![with(Units[Standard])](/support/helpjp/helpview.aspx?si=9449/file03266/math251.png)
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](/support/helpjp/helpview.aspx?si=9449/file03266/math255.png)
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