28 The length of potentiometer wire is 1 m and its 28 Ha

Last updated: 6/12/2023

28 The length of potentiometer wire is 1 m and its 28 Ha resistance is 4 22 A current of 5 mA is flowing in it An unknown source of emf is balanced on 40 cm length of this wire The emf of the source is ufarte 1 fa 40 cm 1 5 mV 2 6 mV 3 12 mV 4 8 mV 1 5 m 3 12 r