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Voltage, Current and Resistance

Q1:

Materials with lots of free electrons are called

A conductors

B insulators

C semiconductors

D filters

ANS:A - conductors

Conductivity of the atom depends on the number of electrons that are in the valence shell. When an atom has only one electron in valence shell, it is almost a perfect conductor. When an atom has eight valence electrons the valence shell is said to be complete and the atom is an insulator.



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