Question

A wire of uniform thickness with a resistance of 27 is cut into three equal pieces and they are joined in parallel. Find the resistance of the parallel combination.

Answer 1

Answer:

Net Resistance R=9 Ohm

Explanation:

Since it is given, the wire is of uniform thickness.So, the area of this particular wire is Uniform

I.e A=Constant

A/Q.....the wire is further divided into 3 equal parts and is connected in parallel to one another.

So, we know 1/R=1/R1+1/R2+1/R3

Each cutted down wire having 27 ohm each

So, Net Resistance becomes,....

1/R=1/27+1/27+1/27

=3/27

=1/9

So,Net R becomes 9 Ohm.....

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