classify resistance on the bases of magnitude
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♠ FOLLOW ♠
♦In electronics and electromagnetism, the electrical resistance of an object is a measure of its opposition to the flow of electric current.
♦The reciprocal quantity is electrical conductance, and is the ease with which an electric current passes.
♦Electrical resistance shares some conceptual parallels with the notion of mechanical friction.
♦The SI unit of electrical resistance is the ohm (Ω), while electrical conductance is measured in siemens (S) (formerly called “mho”s and then represented by ℧).
♦The resistance of an object depends in large part on the material it is made of.
♦Objects made of electrical insulators like rubber tend to have very high resistance and low conductivity, while objects made of electrical conductors like metals tend to have very low resistance and high conductivity...........