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CBSE Class 10 Answered

What happens to the resistance as the conductor is made thinner?
Asked by | 30 Apr, 2012, 08:37: PM
Expert Answer
The resistance of the wire will increase if we made the conductor thinner because R (resistance) = p (rho). l (length) / A (area of cross-section or thickness of wire).
 
Area is directly proportional to the radius of the wire.

So as you can see if area of cross-section ( or thickness) of wire increases, resistance decreases and more current flows through it.
Answered by | 30 Apr, 2012, 09:06: PM
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