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In the given potentiometer circuit length of the wire `AB` is `3 m` and resistance is `R = 4.5 Omega`. The length `AC` for no deflection in galvanometer is A. 2 mB. 1.8 mC. dependent on `r_1`D. none of these |
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Answer» Correct Answer - D d. `E_1` could be balanced if positive terminal of `E_1` would be connected to A. |
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