Answers

2014-10-31T10:03:33+05:30

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
It is not clear how one of the n segments is connected with the voltage 220V.  So I give two possibilities.

Resistance of a uniform wire of cross sectional area A and length L = R = ρL/A
Power dissipated by a resistance R = P = V² / R = I² R ,    V = 220 V
Heat produced by the wire = power * duration = H = V² T /R = I² R T

1)   When the entire wire of length L is connected across V = 220 V, the it produces a heat energy of H.   In the same configuration, one of the n segments of length L/n has resistance R₁ = R/n.   The current flowing through this segment is same as total current I.

  Hence heat produced in this segment is = I²R₁ = I²(R/n) T =  H/n

2)  When one segment of the n segments is connected across voltage V = 220 V,
    then  heat produced is  =  V² T / R₁ = n V² T / R.
 
       So heat produced in one segment is n times that produced by entire wire.

0
not clearly explained i think you lack concept of physics have a look at concept of physics class 12 hc vernma the same question is there and what i have written is right