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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A resistance of 4 Ω and a wire of length 5 meters and resistance 5 Ω are joined in series and connected to a cell of e.m.f. 10 V and internal resistance 1 Ω. A parallel combination of two identical cells is balanced across 300 cm of wire. The e.m.f. E of each cell is

A resistance of 4 Ω and a wire of length 5 meters and resistance 5 Ω are joined in series and connected to a cell of e.m.f. 10 V and internal resistance 1 Ω. A parallel combination of two identical cells is balanced across 300 cm of wire. The e.m.f. E of each cell is

A cell of internal resistance 1.5 ohm and e.m.f. 1.5 volt balances 500 cm on a potentiometer wire. If a wire of 15 ohm is connected between the balance point and the cell then the balance point will shift