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# Learn Financial Freedom Step by Step

The substances which do not allow electric current to flow inside them are called insulators. Because it creates obstruction in the flow of electricity. The best electrical insulator is dry wood, apart from this plastic, rubber and porcelain and PVC plastic are also electrical insulators. These are the material which give all kinds of resistance.

We can measure resistance power

Where

P = E/J

ρ is the static resistivity (in Ω-m)

E electric field, in V/m

J current density, in A/m².

glass 10^10 to 10^14

Rubber (Hard) approx. 10^13

These are high voltage insulators

## Ashok Kumar's Contents\$type=blogging\$show=https://www.svtuition.com/p/ashok-kumar.html\$hide=author

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