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[" 20.One end of a is nichrome wire of l...

[" 20.One end of a is nichrome wire of length "2L" and cross- "],[" sectional area A attached to an end of another nichrome "],[" wire of length "L" and cross sectional area "2A" .If the free end "],[" of the longer wire is at an electric potential of "8.0" volts,and "],[" the free end of the shorter wire is at an electric potential "],[" of "1.0" volt,the potential at the junction of the two wires is "],[" equal to "]

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