What is resistance?

Asked by Sanyukta Khetan | 23rd May, 2012, 06:25: PM

Expert Answer:

Resistance is the opposition that a substance offers to the flow of electric current.  It is represented by the uppercase letter R.  The standard unit of resistance is the ohm, sometimes written out as a word, and sometimes symbolized by the uppercase Greek letter omega.  When an electric current of one ampere passes through a component across which a potential difference (voltage) of one volt exists, then the resistance of that component is one ohm.

Answered by  | 24th May, 2012, 10:33: AM

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