Simple and Complex Tables

A demonstration of HTML table building techniques using very useful electrical engineering data.

SI electromagnetism units
Name Symbol Dimensions Quantity
ampere (SI base unit) A A Current
coulomb C A新 Electric charge, Quantity of electricity
volt V J/C = kg搶2−3−1 Potential difference
ohm Ω V/A = kg搶2−3−2 Resistance, Impedance, Reactance
ohm metre Ω搶 kg搶3−3−2 Resistivity
farad F C/V = kg−1−224 Capacitance
farad per metre F/m kg−1−324 Permittivity
reciprocal farad F−1 kg12−2−4 Elastance
siemens S Ω−1 = kg−1−232 Conductance, Admittance, Susceptance
siemens per metre S/m kg−1−332 Conductivity
weber Wb V新 = kg搶2−2−1 Magnetic flux
tesla T Wb/m2 = kg新−2−1 Magnetic flux density
ampere per metre A/m m−1 magnetic induction
ampere-turns per weber A/Wb kg−1−222 Reluctance
henry H V新/A = kg搶2−2−2 Inductance
henry per metre H/m kg搶新−2−2 Permeability
(dimensionless) - - Magnetic susceptibility

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

Required Direct
Alternating current
Single-phase 3-phase*
KVA   IE  
 1.73 IE 
Kilowatts   IE  
  IE (pf)  
  1.73 IE (pf)  
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

The HTML markup code is very useful to portray information and to have this kind of data handy and at the ready via the internet is a great benefit. I have ideas about portraying other sorts of information and would ask your indulgence in helping to develop them in a process. Would you please view the below pattern of little red squares and report if this representation has a meaning for you?


with HTML
Choose your topic of interest from the lesson plan menu





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Simple and Complex

The below is a banner ad for Tesla Motors.

You will want to know about a site called WC3, You can use the validation service to check the HTML code you write. Just go visit and figure it out for yourself, using this site should be part of your curriculum.

You should know about Spellcheck.net , something that can come in handy.

Tripod will host your HTML files. This is free.

468x60 pixels is a standard banner ad format, the center cell of this table is set to accommodate them by using the width atribute in the TD tag, like so.
<td width="480"align="center" valign="top">

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