In a meter bridge experiment, the balance point is obtained if the gaps are closed by 2 and 3 . A shunt of X is added to 3 resistor to shift the null point by 22.5 cm . The value of ' x ' is

Step-by-step solution

array ll & In case 1, & 2 3 = l 100-l & 200-2 l=3 l & l=40 ~cm array In case 2, aligned & 2 3 x 3+x = 40+22.5 100-(40+22.5) & 2(3+x) 3 x = 62.5 37.5 aligned array ll & (6+2 x) 37.5=3 x(62.5) & 225+75 x=187.5 x & x= 225 112.5 =2 array