In a potentiometer of one metre length an unknown emf voltage source is balanced at 60 cm length of potentiometer wire

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In a potentiometer of one metre length an unknown emf voltage source is balanced at 60 cm length of potentiometer wire, while a 3v battery is balanced at 45 cm length. Then, the emf of the unknown voltage source is :
01
Dec
In a potentiometer of one metre length an unknown emf voltage source is balanced at 60 cm length of potentiometer wire, while a 3v battery is balanced at 45 cm length. Then, the emf of the unknown voltage source is : In a potentiometer of one metre length an unknown emf voltage source is balanced [...]
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