Which metals have the lowest resistivity?

Electrical or thermal condutivity, resistivity, density and melting point
TIBTECHElectrical conductivity (10.E6 Siemens/m)Electrical resistivity (10.E-8 Ohm.m)
Silver62,11,6
copper58,51,7
Gold44,22,3
Aluminium36,92,7
A.

What is resistivity of a material?

The electrical resistivity of a material is also known as its specific electrical resistance. It is a measure of how strongly a material opposes the flow of electric current. A definition of resistivity is the electrical resistance per unit length and per unit of cross-sectional area.
  • What is the total equivalent resistance of the circuit?

    More resistance means less current is flowing through the circuit. Equivalent resistance is a different way of indicating 'total' resistance, which we calculate differently for series and parallel circuits. In a series circuit, the different components are connected in a single, continuous loop.
  • What is resistivity Class 10?

    The resistivity of a material is the resistance of a wire of that material of unit length and unit cross-sectional area. The unit for resistivity is the ohm-metre. The resistivity of a material depends on its nature and the temperature of the conductor, but not on its shape and size.
  • What is the resistivity of copper wire?

    Resistivity and Temperature Coefficient at 20 C
    MaterialResistivity ρ (ohm m)
    Silver1.59x10-8
    Copper1.68x10-8
    Copper, annealed1.72x10-8
    Aluminum2.65x10-8
B.

What is the resistivity of aluminum?

Aluminum is lighter than copper. Aluminum has a resistivity varying from 2.65 to 2.82 × 108 Ω · m. Combined with it's light weight and alloyed with some other metals to make it stronger, aluminum is ideal for electrical cables.
  • What is the resistivity of silver?

    "Resistivities at 20 °C. Silver - 1.59 × 108 Ωm" 1.59 × 108 Ωm. Resistivity is a characteristic of a material that determines the ability of the material to oppose a flow of electrons, or electricity.
  • What is a ohm m?

    An ohmmeter is an electrical instrument that measures electrical resistance, the opposition to an electric current. Megohmmeters (also a trademarked device Megger) measure large values of resistance. The unit of measurement for resistance is ohms (Ω).
  • How is resistivity related to resistance?

    The resistance of an object (i.e., a resistor ) depends on its shape and the material of which it is composed. Resistivity ρ is an intrinsic property of a material and directly proportional to the total resistance R, an extrinsic quantity that depends on the length and cross-sectional area of a resistor.
C.

What is the resistance of gold?

As the graph shows, the resistivity of a substance is very much dependent on temperature. For most conductors, resistivity increases with rising temperature. At 20 °C, the resistivity of gold is approximately 2.44 × 108 ohm-m and steadily rises with increasing temperature.
  • What is the resistivity of Aluminium?

    Aluminum is lighter than copper. Aluminum has a resistivity varying from 2.65 to 2.82 × 108 Ω · m. Combined with it's light weight and alloyed with some other metals to make it stronger, aluminum is ideal for electrical cables.
  • What is the resistivity of a Nichrome wire?

    The unit of resistivity is then ohm-meters (Ωm). Nichrome, a non-magnetic alloy that is commonly made up of 80% nickel and 20% chromium, has a resistivity ranging from 1.10 × 106 Ωm to 1.50 × 106 Ωm (0.00000110 Ωm to 0.00000150 Ωm) and a very high boiling point (~1400 °C).
  • What is the resistivity of copper?

    We have also learnt that the resistivity (symbol: ρ) of the conductor (or material) relates to the physical property from which it is made and varies from material to material. For example, the resistivity of copper is generally given as: 1.72 x 10-8 Ω.m.

Updated: 16th October 2019

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