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(a) State Kirchhoff's rules for an elect...

(a) State Kirchhoff's rules for an electirc network. Using Kirchhoff's rules, obtain the balance condition in terms of the resistances of four arms of Wheatstone bridge.
(b) In the meter bridge experimental set up, shown in the figure, the null point 'D' is obtained at a distance of 40 cm from end A of the meter bridge wire. If a resistance of `10 Omega` is connected in series with `R_(1),` null point is obtained at `AD = 60 cm. ` Calculate the values of `R_(1) and R_(2).`

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