The Electromagnetic System of Units (EMU) - Maple Programming Help

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The Electromagnetic System of Units (EMU)

 

Description

Examples

Description

• 

The electromagnetic system of units (EMU) has the centimeter, gram, second, and biot as its base units, where the biot is energy-equivalent to the unit square root dyne (cmgs). For naming consistency, the biot is called the abampere.

• 

When used in conjunction with the UseSystem command, the electromagnetic system sets the following units for the given dimensions.

Dimension Name

Unit Name

 

 

length

centimeter

mass

gram

time

second

speed

kyne

acceleration

gal

force

dyne

energy

erg

power

erg per second

pressure

barye

electric current

abampere

electric charge

abcoulomb

electric capacitance

abfarad

magnetic inductance

abhenry

electric conductance

absiemens

electric resistance

abohm

magnetic flux density

abtesla

electric potential

abvolt

magnetic flux

abweber

plane angle

radian

solid angle

steradian

Examples

Electromagnetic units can be converted to their energy equivalents.

convert1,'units','dyne','abampere','energy'

1

(1)

convert1,'units','cm''g','abcoulomb','energy'

1

(2)

If infolevel is set to a greater integer (possible settings are 1 through 5), more detailed information about the computation method is displayed.

infolevelUnits1:

convert1.28523,'system','W','EMU'

convert/system:   "converting to the units erg/s"

1.285230000107

(3)

convert5.2324932,'system','mho','EMU'

convert/system:   "converting to the units abS"

5.23249320010-9

(4)

unassign'infolevelUnits'

withUnits[Standard]:

Units[UseSystem]'EMU'

Notes: 

– 

To enter a unit in 2-D Math input, select the unit from the appropriate Units palette. If the unit you want is not there, select unit and then enter the unit.

– 

In Maple 2015 and later versions, the double brackets around a unit are not displayed unless you are editing the unit.

5'kg''m''s'

5kgms

(5)

combine,'units'

500000gcms

(6)

's'

500000dyn

(7)

'cm'2

500000barye

(8)

See Also

convert/system

convert/units

infolevel

unassign

Units

Units/EnergyConversions

Units/Index

Units/Standard

Units/Systems

Units[UseSystem]

 


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