In a meter bridge experiment, initially the jockey is at null point. Now resistance R1 and R2  is interchanged. Shift in the position of  jockey is ____cm

Meter bridge works on the principle of wheat stone bridgeFrom diagram  R1=2 Ω, R2=3 ΩInitially R1R2=23=l100−l⇒l=40 cmNowR2R1=32=l'100−l'⇒l'=60 cmShift, l'−l=60−40=20 cmTherefore, the correct answer is 20.00