Answer to Question #72507 in Electric Circuits for Shiwami

Question #72507

Cells A and B and a galvanometer G are connected to a slide wire OS by two sliding contacts X and Y. The slide wire is 10cm long and has a resistance of 12ohm. With OY 75cm,the galvanometer shows no deflection when OX is 50cm. If Y is moved to touch the end of the wire at S,the value of OX which gives no deflection is 62.5cm. Emf of cell B is 1V. Calculate: a. The p.d across OY when Y is 75cm from O with null deflection. B. The p.d. across OS when Y touches S with null deflection. C. The internal resistance of cell A. d. The emf of cell A

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