An unknown resistance math xmlns=http://www.w3.org/1998/Math/MathML...

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An unknown resistance math xmlns=http://www.w3.org/1998/Math/MathMLmix/mi/math is connected with math xmlns=http://www.w3.org/1998/Math/MathMLmn20/mnmi mathvariant=normalΩ/mi/math resistance is series and combination is connected in left gap of meter-bridge. math xmlns=http://www.w3.org/1998/Math/MathMLmi mathvariant=normalR/mi/math is connected in right gap and null point is obtained at math xmlns=http://www.w3.org/1998/Math/MathMLmn60/mnmo /momicm/mi/math, when math xmlns=http://www.w3.org/1998/Math/MathMLmn20/mnmi mathvariant=normalΩ/mi/math resistance is removed and only math xmlns=http://www.w3.org/1998/Math/MathMLmi mathvariant=normalx/mi/math is connected in left gap, balance point shift to math xmlns=http://www.w3.org/1998/Math/MathMLmn50/mnmo /momicm/mi/math. The value of math xmlns=http://www.w3.org/1998/Math/MathMLmix/mi/math is?
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