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Most Important Selected Qs for JEE AdvancedPhysicsMagnetic Effects of Current

In each of the following diagrams, the magnetic field in the circular region is inside the plane of the paper and is increasing with time. Four different shaped metallic conductors 'PQR' are placed as shown. The end P will be more positively charged compared to R in: ( Q is the centre in options A B)

Correct answer

3

Step-by-step solution

The changing magnetic field inside the plane produces electric lines of forces in anticlockwise direction. There is no direct connection in the shown conductors, so electrons, experiencing electric force, try to accumulate as shown. All electrons accumulate at Q symmetrically V_P=V_R All electrons accumulate at RV_P V_R electrons accumulate at P V_P V_R electrons accumulate at RV_P V_R

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