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AP EAMCET Engineering 20 Apr 2019 Shift 1 Paper

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Question : 113

Total: 160

To measure a magnetic field between the magnetic poles of a loud speaker, a small coil having 30 turns and 2.5 cm area is placed perpendicular to the field and removed immediately. If the total charge flown through the coil is 7.5 × 10−3 C. and the total resistance of wire and galvanometer is 0.3 Q. then the magnitude of the magnetic field is

0.03 T
0.3 T
3 T
3 × 102 T

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