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(chatquestion)...wire. The ratio of mag coils respectively :- (4) 4 : 1 (3) 1 : 8 ge (2) 1 : 1 (1) 1 : 4 arm 7. Magnetic field at point O will be :- of the (2) 2R (1) 2R Hol 1+ (4) 2R Hol (3) 2R nt

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