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[" If a magnet of length "10cm" and pole...

[" If a magnet of length "10cm" and pole strength "40A-m],[" is kept at an angle of "45^(@)in" a constant induction field "],[" of intensity "2times10^(-4)T" ,then find couple acting on it."],[0.656times10^(-5)N-m],[0.656times10^(-6)N-m],[0.5656times10^(-3)N-m],[0.5656times10^(-4)N-m]

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