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If a coil of `40` turns and area `4.0 cm^(2)` is suddenly remove from a magnetic field, it is observed that a charge of `2.0xx10^(-4)C` flows into the coil. If the resistance of the coil is `80Omega`, the magnetic flux density in `Wb//m^(2)` isA. `0.5`B. `1.0`C. `1.5`D. `2.0` |
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Answer» Correct Answer - B `DeltaQ=(Deltavarphi)/(R )=(nxxBA)/(R )` `impliesB=(DeltaQ.R)/(nA)=(2xx10^(-4)xx80)/(40xx4xx10^(-4))=1 Wb//m^(2)` |
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