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Useful science algebra math formulas, electrical formula, mathematics formulas,
geometry formulas, trigonometry, Linear - We provide a reference guide math formula links page that covers most basic, physics.
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Links
to math formulas and physics formulas
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Dr Math
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- - - Ask Dr. Math: Selected answers to common questions.
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math.com
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- The world of math online.
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math2.org
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- General, Geometry, Algebra, Trig, Linear, Advanced ( Fourier
series ).
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University of liverpool - Here you can find basic physics formula.
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tutor4physics.com
- - Basic physics formula, Work and energy - law of motion etc
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nas.cl.uh.edu
- - - Mechanics, theory wave, law thermodynamics, Electromagnetism.
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Educypedia
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formula physics formula.
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Maths definitions - - Real
numbers | Mathematical Symbols | Order of Operation.
Standard math electrical formula terminology
Volt
(E) is the unit of electric pressure or electromotive force. It is the
potential that will produce a current of 1 ampere through a resistance of 1
ohm.
Ampere (I) is the unit of electrical current (coulombs per second).
Ohm (R) is the unit of electrical resistance (volts/ampere).
Watts (W) and kilowatts (KW) are units of electric power.
Kilovolt-ampere (KVA) is a measurement of apparent electric power.
Kilowatt hour (Kwhr) is a unit of electrical energy or work performed.
Joule (J) is a metric unit of energy: watt per second.
1 Kwhr = 2,655,000 ft-lb = 1.341 hp-hr = 3413 Btu = 3,600,000 joules.
Ohm law relationships (direct current) E = IR + W/I = √WR
W = I2R = E2/R = EI
I = E/R = W/E = √W/R
R = E/I = W/I2 = E2/W
For math electrical formula, see the table charts below. Use the symbols above plus the
ones defined in the text above the table.
Electrical
formula - math electrical power formula
Use the math symbols in Electrical Terminology above, plus:
eff = efficiency (expressed as a decimal)
pf = power factor (expressed as a decimal)
hp = horsepower output
| Required |
Direct
current |
Alternating current |
| Single-phase |
3-phase* |
| KVA |
— |
IE
1000 |
1.73
IE
1000 |
| Kilowatts |
IE
1000 |
IE
(pf)
1000 |
1.73
IE (pf)
1000 |
| Horsepower (output) |
IE (eff)/746 |
IE (eff)(pf)/746 |
1.73 IE (eff)(pf)/746 |
| Joules |
IE/sec |
IE (eff)(pf)/sec |
1.73 IE (eff)(pf)/sec |
| Amperes (hp known) |
746 (hp)/E (eff) |
746 (hp)/E (eff)(pf) |
746 (hp)/1.73 E (eff)(pf) |
| Amperes (KW known) |
1000 KW/E |
1000 KW/E (pf) |
1000 KW/1.73 E (pf) |
| Amperes (kva known) |
— |
1000 KVA/E |
1000 KVA/1.73 E |
*For 3-phase systems, E is measured line to line and I is phase current.
| SI
electromagnetism units |
| Name |
Symbol |
Dimensions |
Quantity |
| ampere (SI base unit) |
A |
A |
Current |
| coulomb |
C |
A·s |
Electric charge, Quantity of electricity |
| volt |
V |
J/C = kg·m2·s−3·A−1 |
Potential difference |
| ohm |
Ω |
V/A = kg·m2·s−3·A−2 |
Resistance, Impedance, Reactance |
| ohm metre |
Ω·m |
kg·m3·s−3·A−2 |
Resistivity |
| farad |
F |
C/V = kg−1·m−2·A2·s4 |
Capacitance |
| farad per metre |
F/m |
kg−1·m−3·A2·s4 |
Permittivity |
| reciprocal farad |
F−1 |
kg1·m2·A−2·s−4 |
Elastance |
| siemens |
S |
Ω−1
= kg−1·m−2·s3·A2 |
Conductance, Admittance, Susceptance |
| siemens per metre |
S/m |
kg−1·m−3·s3·A2 |
Conductivity |
| weber |
Wb |
V·s
= kg·m2·s−2·A−1 |
Magnetic flux |
| tesla |
T |
Wb/m2
= kg·s−2·A−1 |
Magnetic flux density |
| ampere per metre |
A/m |
m−1·A |
magnetic induction |
| ampere-turns per weber |
A/Wb |
kg−1·m−2·s2·A2 |
Reluctance |
| henry |
H |
V·s/A = kg·m2·s−2·A−2 |
Inductance |
| henry per metre |
H/m |
kg·m·s−2·A−2 |
Permeability |
| (dimensionless) |
- |
- |
Magnetic susceptibility |
This article is licensed under the GNU
Free Documentation License. It uses material
from the Wikipedia article "electromagnetism".
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