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  4. Consider the situation shown in the figure. The wire AB is sliding on the fixed rails with constant velocity v . If the wire AB is replaced by a semicircular wire, the magnitude of the induced current will <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/p-knf3lo0e0hx2wzmm.jpg />

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Q. Consider the situation shown in the figure. The wire $AB$ is sliding on the fixed rails with constant velocity $v$ . If the wire $AB$ is replaced by a semicircular wire, the magnitude of the induced current will
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NTA AbhyasNTA Abhyas 2022

Solution:

As we have to consider the length perpendicular to velocity vector and magnetic field vector independent of shape and length of wire, the perpendicular length between two wires is constant hence value of induced current will remain constant.