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5. a) A wire loop of resistance 10 ohm and radius 10 cm is kept in the plane of thispaper in a uniform magnetic field B. The direction of B is perpendicular to theplane of the page and points out of it and its magnitude is increasing at the rateof 0.50 Ts-. Determine the magnitude and direction of the induced current in theloop. |
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Answer» We write the law of electromagnetic induction\epsilon_i=\frac{\Delta \PHI} { \Delta t}=\frac{\Delta B \cdot S} { \Delta t}=\frac{\Delta B } { \Delta t}\cdot Sϵ i = ΔtΔΦ = ΔtΔB⋅S = ΔtΔB ⋅SWhere\frac{\Delta B } { \Delta t} ΔtΔB -the rate of change of the magnetic fieldS=\pi \cdot r^2S=π⋅r 2 -ring areaThen we write down OHM’s lawI_i=\frac{\epsilon_i}{R}=\frac{\Delta B } { \Delta t}\cdot \frac{S}{R}=0.5\cdot \frac{3.14 \cdot 0.1^2}{10}=1.57mAI i = Rϵ i = ΔtΔB ⋅ RS =0.5⋅ 103.14⋅0.1 2 =1.57mAplease mark as brainlest answer |
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