Dear experts pls solve this

7. The reading of the (ideal) ammeter , in the circuit shown here , equals
(i) I when key K1​ is closed but key K2​ is open.


(ii) I/2 when both keys K
1 and  K2 is closed 


Find the expression for the resistance of X in terms of the resistances of R and S.

 

Dear student,



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