PhysicsMedium116×since 2002Q7729The magnetic moments associated with two closely wound circular coils A\mathrm{A}A and B\mathrm{B}B of radius rA=10\mathrm{r}_{\mathrm{A}}=10rA=10 cm\mathrm{cm}cm and rB=20 cm\mathrm{r}_{\mathrm{B}}=20 \mathrm{~cm}rB=20 cm respectively are equal if : (Where NA,IA\mathrm{N}_{\mathrm{A}}, \mathrm{I}_{\mathrm{A}}NA,IA and NB,IB\mathrm{N}_{\mathrm{B}}, \mathrm{I}_{\mathrm{B}}NB,IB are number of turn and current of A\mathrm{A}A and B\mathrm{B}B respectively)A4 NAIA=NBIB4 \mathrm{~N}_{\mathrm{A}} \mathrm{I}_{\mathrm{A}}=\mathrm{N}_{\mathrm{B}} \mathrm{I}_{\mathrm{B}}4 NAIA=NBIBB2 NAIA=NBIB2 \mathrm{~N}_{\mathrm{A}} \mathrm{I}_{\mathrm{A}}=\mathrm{N}_{\mathrm{B}} \mathrm{I}_{\mathrm{B}}2 NAIA=NBIBCNA=2 NB\mathrm{N}_{\mathrm{A}}=2 \mathrm{~N}_{\mathrm{B}}NA=2 NBDNAIA=4 NBIB\mathrm{N}_{\mathrm{A}} \mathrm{I}_{\mathrm{A}}=4 \mathrm{~N}_{\mathrm{B}} \mathrm{I}_{\mathrm{B}}NAIA=4 NBIBCheck answerSkip