What's a resistance unit?
A resistance unit is a device that provides resistance to the inflow of an electric current. Resistance units are used to control the quantum of current flowing through a circuit.
Unit of resistance
Resistance may be a physical property of a material due to which, the fabric resists the inflow of electricity through it. Resistance depends on the physical confines of the fabric, its composition, and temperature. the essential property resistivity or specific resistance is a measure of the resistance offered by a material. The resistance of a captain is extremely low whereas insulators have veritably high resistances. The resistance of a line is commensurate to its length and equally commensurable to its cross-sectional area. Resistance may be a scalar volume and it's expressed using a number with applicable units. The SI unit of resistance is Ohm.
Description of Resistance Ohm's law
Ohm's law states that if a captain maintains a constant temperature with its other physical amounts, also the presence of that captain will always be commensurable to the implicit difference applied to it sends. However, also mathematically, the present I flowing through the captain is If a captain features an implicit difference V between it sends. I ∝ V
The proportionality constant is R,
Depending on the physical state and composition of the element material, R is the resistance of the captain.
Dimension And Unit of Resistance Formula
Firstly named for Georg Ohm, the Ohm (Ω) unit of resistance is the SI unit of resistance. the worth of the volume is 1 Ohm when 1 A of current overflows through both ends of the captain, handed the captain features an implicit difference of 1V between the two ends.
1Ω = 1V/ 1A
The dimension of resistance is
M) (L2) (T- 3) (I- 2)
SI Unit of Resistance
The unit of resistance is ohms, which is acceptable to one volt per amp. In some cases of, the Greek letter omega represents the unit. The method for Ohm is as follows;
R = V/ I
The unit ohm- cadence or ohm- m can measure specific resistance or resistivity.
The resistance R of a captain depends on its length L, sampling A, and its composition. For a hard and fast sampling, the resistance is commensurable to the length of the captain. Whereas the resistance is equally commensurable to the sampling for a hard and fast length. These two dependences are frequently written down combinedly as,
R ∞ L/ A
R = p L/ A
Then, may be a proportionality constant, which is understood as the specific resistance. The resistance of a homogeneous knob of a cloth of unit length and unit sampling is defined as the resistivity or specific resistance of the material. Quantitatively,
p = RA/ L
The SI unit of inelastic resistance is Ohm m (Ω. m).
Different Units of Resistance
The larger units of resistance is Kilo- Ohm, Mega-Ohm and Giga- Ohm. The bottom units of resistance are milli Ohm, Micro Ohm and nano Ohm.
The relationship between various resistance units is as given below. the colorful units for resistance are;
Resistance unit Value in Ohm (Ω)
1 Giga Ohm (G Ω)= 10^9 Ω
1 Mega Ohm (M Ω)= 10^6 Ω
1 Kilo Ohm (K Ω)= 10^3 Ω
1 Milli Ohm (m Ω)= 10^-3 Ω
1 Micro Ohm (μ Ω)= 10^-6 Ω
1 Nano Ohm (n Ω)= 10^-9 Ω
All resistance units are subject to changes in external conditions (temperature and moisture for illustration). These changes can beget oscillations in resistance, which can affect in incorrect readings. thus, resistance units should be calibrated previous to use, and periodically calibrated as a top quality control measure.