The resistance of a given piece of wire or conductor depends on four factors: the length of the wire, the cross-sectional area of the wire, the resistivity of the material composing the wire and ...

They have a high resistance and are called insulators . Non-metals are poor conductors because they have very few free electrons. This makes it difficult for electrical current to flow through them.

Any electrical insulation must have the opposite characteristic as the conductor: It should resist the flow of current, keeping it within the conductor. Using Ohm's Law To better understand Ohm's Law ...

A superconductor is a material that achieves superconductivity— a state of matter that has no electrical resistance and does not allow magnetic fields to penetrate.

In conventional superconductors, atomic vibrations induce the electron pairing. Most of these materials need to be chilled below 20 K before they shed electrical resistance.

This story is from November 13, 2012 Transmission corporation limited's 'love' for high-resistance conductors evokes criticism Pankaj Shah / TNN / Updated: Nov 13, 2012, 08:01 IST AA Follow us ...