- The German scientist George Ohm (1787 -1854) is best remembered for working out ohm’s law. He discovered that they voltage across a conductor such as a trip of metal or a wire – and the current following through it always vary in the same proportion. So if you double the voltage, you double the current. This is incredibly useful; because it lets you predict the current you will get for a particular voltage.
- The thickness of silk is measured in what Den ier
- Ohm’s law does not apply to semiconductors and conductors when there is change in ternperature.
- Hertz and Angstrom are units of frequency
- Units of work and energy are Jou le and Erg (CGS)
- Diopter is unit of power of lens
- Unit is density is kg/m3
- Unit of power is watt, BTU (Board of Trade Unit)
- Unit of electric charge is Coulomb
- Unit of voltage is volt
- Unit of electric resistance is ohm
- Unit of capacitance is Farad
- Unit of magnetic flux is Weber, Tesla
- Unit of radio activity is Becquere l
- Unit of luminous intensity is candle, lux
- Unit of crude oil is Barre l
- Unit of volume of water is cusec, cubic/sec
- Unit of admittance is Mho
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