Define electrical resistance and write its si unit discuss how the resistance of a conducting wire depends on its length, cross-sectional area and temperature. 2
Answers
Here is your answer mate: -
*Electrical Resistance is the characteristic property of the conductor on the basis of which it opposes the flow of current through the conductor.
*It's SI unit is Omega also known as (Ohm).
*Resistance of a conductor is directly proportional to length of the conductor. So if length is doubled so resistance also gets doubled.
*Resistance is inversely proportional to area of Cross section of conductor. So if area of Cross section is doubled so resistance gets halved.
*Resistance increase with temperature. So if resistance is more so it will oppose more the flow of current and electrical energy will be transformed into heat energy and as a result temperature of the conductor will increase.
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