What is the resistivity of Nichrome?
Resistivity of some common materials
| Material | Resistivity (OHM-CMIL/FT) | Resistivity (10−6 OHM-CM) |
|---|---|---|
| Nichrome | 675 | 112.2 |
| Nichrome V | 650 | 108.1 |
| Nickel | 41.69 | 6.93 |
| Platinum | 63.16 | 10.5 |
How much is the resistivity of Nichrome?
Nichrome, a non-magnetic alloy that is commonly made up of 80% nickel and 20% chromium, has a resistivity ranging from 1.10 × 10−6 Ωm to 1.50 × 10−6 Ωm (0.00000110 Ωm to 0.00000150 Ωm) and a very high melting point (~1400 °C).
What is the resistivity of Nichrome 1?
Resistivity and Temperature Coefficient at 20 C
| Material | Resistivity ρ (ohm m) | Ref |
|---|---|---|
| Lead | 22 | 1 |
| Mercury | 98 | 1 |
| Nichrome (Ni,Fe,Cr alloy) | 100 | 1 |
| Constantan | 49 | 1 |
Does Nichrome have high resistivity?
Nichrome alloy is a mixture of two elements- 80% Nickel and 20% Chromium. Even at 0 K temperature the specific resistivity of Nichrome is very high and it varies linearly with increase in temperature. It has a high specific resistivity due to which it opposes the flow of current and hence it has a high resistance too.
How do you find the resistivity of nichrome?
Measured length of nichrome wire = 0.951 m. Resistance of wire = 29.3 – 0.02 = 29.1 Ω. The resistivity of nichrome is 1.06×10−6 Ω .
Does nichrome have low resistivity?
Detailed Solution. Nichrome has low resistivity. Nichrome is a non-magnetic alloy that is made up of 20% chromium and 80% nickel. It has a very high melting point, that makes nichrome to make high-temperature wires.
What is the resistivity formula?
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.
Which has more resistivity nichrome or copper?
Copper is a metal and thus has resistivity lower than that of an alloy and so lower than nichrome. And since resistance of nichrome is greater than that of copper. Hence, heat generated in the nichrome will be more than that of the copper.
What is resistivity solution?
Answer: Resistivity of any solution : When current flow in the solution through two electrodes resistance is proportional to length and inversely proportional to cross sectional area A. Thus, Resistivity of any solution is the resistance of one cm cube.
Why does nichrome have a higher resistance than copper?
melting point for a nichrome wire is greater than copper wire, so that the resistance at nichrome wire will be greater than copper wire.
On which factors resistivity of a conductor depends?
Note: The resistivity of a conductor depends only on the above mentioned three factors i.e., length, area of cross-section, and nature of the material of the conductor. Additionally, it also depends upon the physical conditions like temperature and pressure but is independent of its shape and size.
Why does nichrome wire have a high resistance?
We believe that increasing the temperature of the nichrome wire will cause the measured resistance of the wire to also increase. This is because nichrome is composed of metals, and the resistivity of metals generally increases with temperature (Bortner).
Is Nichrome a high or low resistance?
Nichrome, a non-magnetic 80/20 alloy of nickel and chromium, is the most common resistance wire for heating purposes because it has a high resistivity and resistance to oxidation at high temperatures. When used as a heating element, it is usually wound into coils.
Why is nichrome used as a heating element?
Nichrome is used as a heating element because it has high physical strength at high temperatures, has a resistivity that is practical for elements operating at AC line voltage, and is corrosion resistant when operated at elevated temperatures in a normal atmosphere.
Why is nichrome wire used in an iron?
Nichrome wire should be used as the heating element in an electric iron. The reasons are mentioned below: High resistivity thus ensuring the wires to heat up faster. High specific heat which provide enough heat to the element.