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4. The internal-resistance of a battery, in the circuit diagram shown in the figure is 2 Omega and a battery has an emf of magnitude 18v.
a. Find the reading of the ammeter and voltmeter in the circuit provided that switch S is closed.
b. Find the reading of the voltmeter when switch S is open.
![4 The Internalresistance Of A Battery In The Circuit Diagram Shown In The Figure Is 2 Omega And A Battery Has An Emf Of Magnitude 18va Find The Reading Of The A class=](https://us-static.z-dn.net/files/def/b46e612f850a4f757c8e8ef259201abd.jpg)