A potentiometer circuit set up is shown. The potential gradient, ac...
A potentiometer circuit set up is shown. The potential gradient, across the potentiometer wire, is math xmlns=http://www.w3.org/1998/Math/MathMLmi mathvariant=normalk/mi/math voltmath xmlns=http://www.w3.org/1998/Math/MathMLmo//momicm/mi/math and the ammeter present in the circuit reads math xmlns=http://www.w3.org/1998/Math/MathMLmn1/mnmo./momn0/mnmo /momi mathvariant=normalA/mi/math when two way key is switched off. The balance points, when the key between the terminals (i) 1 and 2 (ii) 1 and 3 , is plugged in, are found to be at lengths math xmlns=http://www.w3.org/1998/Math/MathMLmsubmil/mimn1/mn/msubmo /momicm/mi/math and math xmlns=http://www.w3.org/1998/Math/MathMLmsubmil/mimn2/mn/msubmo /momicm/mi/math respectively. The value of the resistor math xmlns=http://www.w3.org/1998/Math/MathMLmi mathvariant=normalR/mi/math and math xmlns=http://www.w3.org/1998/Math/MathMLmi mathvariant=normalx/mi/math, (in ohm) are equal to
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