CALCULATION OF CABLE RESISTANCEHence R = 22.5/10 = 2.25 Ohms per km. Length of conductor = 500m =500/1000 = 0.5km. Therefore resistance of copper conductor = 2.25 x 0.5 =1.125 Ohms. Similarly for Aluminium, The resistance per km for Aluminium is given by: R = 36/S(c.s.a) Again S = 10mmsq. Hence R = 36/10 = 3.6 Ohms per km. Length of conductor = 0.5km.
its length – the longer the wire, the greater its resistance. its cross-sectional area A – the greater the area, the less its resistance. the resistivity of the material r – the greater the resistivity, the greater its resistance.
V = Voltage (your battery voltage) I = Current (the amperage drawn by your coil) R = Resistance (the resistance, in ohms, of your coil)
Beside this, how do you calculate resistance length?
To calculate the resistance R of a wire, we need to know three things:
Also, how do you find resistance per unit length? 4. FORMULA:-1) resistance of the wire,R=1/m Where R=resistance of the wire,m=slope of the graph of current versus potential difference. 2)resistance per unit length=R/LWhere L=the length of the experimental wire.
One may also ask, how do you find resistance with length and diameter?
There are three main factors in wire resistance: The length The diameter And the material being used to make the wire R = p (L / A) The resistance is proportional to the length of the wire divided by its cross-sectional area. p is the resistivity of the material in question and varies greatly.
What is conductivity formula?
As a reciprocal quantity, conductivity is a measure of how easy a material permits the flow of current. This are related by: Resistivity = 1 / conductivity. The equation is: ρ = 1 / σ
What is R pL A?
R=pL/A. where, R= Resistance of conductor. p= Resistivity of conductor. L= Length of conductor.What is the equation for resistance?
Rearrange V = IR to solve for resistance: R = V / I (resistance = voltage / current). Plug the values you found into this formula to solve for total resistance. For example, a series circuit is powered by a 12 volt battery, and the current is measured at 8 amps.What is a series circuit?
A series circuit is one that has more than one resistor, but only one path through which the electricity (electrons) flows. All the components in a series circuit are connected end-to-end. A resistor in a circuit is anything that uses some of the power from the cell. In the example below, the resistors are the bulbs.What is the unit of resistance?
The ohm (symbol: Ω) is the SI derived unit of electrical resistance, named after German physicist Georg Simon Ohm.What is the relationship between resistance and length?
For a given material, resistance and length formula clearly speaks that the resistance is directly proportional to its length. When the length of the material is increased, its value of resistance also increases. When the length of the material decreases, its value of resistance will also decrease.What is the resistance of 2.5 mm cable?
| Table 5.5 - Resistance per metre of copper conductors at 20°C for calculation of R1 + R2 | |
|---|---|
| Conductor cross-sectional area (mm²) | Resistance per metre run (m ohms / m) |
| 1.5 | 12.10 |
| 2.5 | 7.41 |
| 4.0 | 4.61 |
How is current measured?
Current can be measured using an ammeter. Electric current can be directly measured with a galvanometer, but this method involves breaking the electrical circuit, which is sometimes inconvenient. Current can also be measured without breaking the circuit by detecting the magnetic field associated with the current.What happens to resistance when diameter is halved?
As we know that resistance of a wire is inversely proportional to the square of its diameter. Thus when the diameter of a wire is doubled (made 2 times), its resistance becomes one-fourth (1/4), and if the diameter of a wire is halved (made 1/2), then its resistance becomes four times (4 times).Does resistance increase with length?
when you have longer length of wire, the current has to travel more distance, more the distance higher the number of obstacles it faces through its path. Therefore resistance increases with the length. Therefore less amount of obstacles for the current. Therefore when area increases the resistance decreases.Does diameter affect resistance?
As the diameter of the wire increases, the resistance decreases. In fact, if we double the cross-sectional area then the resistance halves. This means that resistance is inversely proportional to the area of the wire.What are the laws of resistance?
The laws of resistance states that the Resistance “R” offered by a conductor depends upon following factors: The resistance of conductor is the obstruction posed by the conductor to the flow of current through it. The Resistance “R” is dependent on the Nature of the material.Why is resistance directly proportional to length?
The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area. Resistance also depends on the material of the conductor. The resistance of a conductor, or circuit element, generally increases with increasing temperature.What is an easy definition for resistance?
Resistance is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω). Conductors: Materials that offer very little resistance where electrons can move easily.How do you determine wire length?
To calculate spring wire length per coil, you must subtract the wire diameter from the outer diameter in order to get mean diameter. Once you have calculated mean diameter, multiply it by pi (3.14); this will give you the length of wire per coil.How do you calculate the resistance of a coil?
The hardest part of this will be remembering what the letters represent, and that's easy:What is resistance divided by length?
High resistivity designates poor conductors. Resistivity, commonly symbolized by the Greek letter rho, ρ, is quantitatively equal to the resistance R of a specimen such as a wire, multiplied by its cross-sectional area A, and divided by its length l; ρ = RA/l. The unit of resistance is the ohm.What does per unit length mean?
Mass per unit length means the distribution density of mass along it's length . just the same as volume mass density , mass per unit length tells about linear distribution of mass along the length.ncG1vNJzZmiemaOxorrYmqWsr5Wne6S7zGifqK9dmbxuxc6uZJyZnJjCra3TnmSrnaOewLWtzZycZp6ipLpur8Cbo55lnJq7qMDH