|
USA-MN-CHASKA selskapets Kataloger
|
Firma Nyheter:
- electrical resistance - Definition of Ohm in SI basic units in words . . .
the work done by the conductor per unit charge per unit current through the conductor, or in terms of SI units, $\mathrm{\frac JC\cdot \frac1A}$ which is the same as: the work done by the conductor per unit current per unit time per unit current, $\mathrm{\frac J{A\cdot s\cdot A}}$
- electrical resistance - How to interpret resistivity and its unit . . .
By this procedure you get rid of the size dependence and $\rho$ will depend basically on the material only (and temperature, etc) Also it explains the unit $\Omega m$ A procedure like this is very common in physics and usually denoted by the word specific, i e you could call $\rho$ the specific (electrical) resistance
- units - CGS of resistance - Physics Stack Exchange
What's the CGS unit of resistance? Is it the same as that in SI system, i e ohm (Ω)? I googled but found no explicit answer
- electromagnetism - What is the meaning of unit of electrical . . .
While the resistivity is equal the resistance of a metre-cube of the substance you don't need an actual block to do the measurement You can measure the resistance of a small prism of the substance, and use the proportionalities to work out the resistance that a metre cube would have $\endgroup$ –
- electric circuits - Why does electrical resistivity have units of . . .
Electrical resistivity has units of $\Omega \cdot \mathrm{m} $ However, since resistivity can be described as the resistance of a unit cube, shouldn't the units therefore be $\Omega \cdot \mathrm
- Units for electrical conductivity - Physics Stack Exchange
I note from Wikipedia that electrical resistivity and conductivity are reciprocals of each other, and that the unit for electrical resistivity is the ohm-metre (Ω⋅m), while the unit for conductivity is siemens-per-metre (S⋅m $^{-1}$)
- Why is an Ampere an SI unit? - Physics Stack Exchange
What's more, (in SI units) charge being described as the amount of electricity carried over 1 second by 1 ampere of current does not seem very intuitive I can't think of any other quantity that (in SI units) is a quantity over seconds, in most cases it is a quantity per seconds If a Coulomb was an SI unit then an Ampere would be 'Coulombs
- What *exactly* is electrical current, voltage, and resistance?
In an electrical circuit, the current is generally related to the flow of electrons through the wires (By the way, the velocities of those electrons are very small LOTS of electrons move slowly to give sizeable currents) electrical voltage Electrical voltage is the different in the electrical potential of two locations
- Thermal resistance help with different units - Physics Stack Exchange
This makes sense, as (m² × K) W is the units for thermal resistance So why do datasheets for electronic components give thermal resistance with units of °C W? I understand °C W likely means for every watt of power dissipated by the device, the device heats up by that temperature
- Why is conductivity defined as the inverse of resistivity?
The reason that conductivity is the multiplicative inverse of resistance is because current, voltage, and resistance are related through multiplication It indeed makes sense to define a number called conductivity such that, when the resistivity of the material decreases, the conductivity increases
|
|