Electrical resistivity’s of few material in is given below:
Material Resistivity
Silver 1.60x10-8
Copper 1.62x10-8
Tungsten 5.20x10-8
Iron 10.0x10-8
Mercury 94.0x10-8
Nichrome 100x10-6
(a) State the unit of resistivity.
(b) Among the given material which is the best conductor?
(c) Which material would you suggest to be used as electrical heating devices?
(d) Which material is used for filaments of electric bulbs?
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