the emf of the battery is

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The length of a wire of a potentiometer is 100 cm, and the emf of its standard cell is E volt. It is employed to measure the emf of a battery whose internal resistance is 0.5Ω. If the balance point is obtained at l=30 cm from the positive end, the emf of the battery is
13
Nov
The length of a wire of a potentiometer is 100 cm, and the emf of its standard cell is E volt. It is employed to measure the emf of a battery whose internal resistance is 0.5Ω. If the balance point is obtained at l=30 cm from the positive end, the emf of the battery is [...]
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Tags: and the emf of its standard cell is E volt. It is employed to measure the emf of a battery whose internal resistance is 0.5Ω. If the balance point is obtained at l=30 cm from the positive end , the emf of the battery is , The length of a wire of a potentiometer is 100 cm ,