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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A thin wire AC shaped as a semi-circle of diameter d rotates with a constant angular frequency (ω) in a uniform magnetic field of indcution B. The vector ω is parallel to B and the rotation axis XY passes through the end A of the wire and is perpendicular to the diameter AC (see Fig.). B is directed left to right in the plane of the paper. The value of the line intergral I = ∫E ⋅dr taken along the wire form the point A to the point C will be ωBd2/ ?. What integer should be inserted in place of question mark.

A thin wire AC shaped as a semi-circle of diameter d rotates with a constant angular frequency (ω) in a uniform magnetic field of indcution B. The vector ω is parallel to B and the rotation axis XY passes through the end A of the wire and is perpendicular to the diameter AC (see Fig.). B is directed left to right in the plane of the paper. The value of the line intergral I = ∫E ⋅dr taken along the wire form the point A to the point C will be ωBd2/ ?. What integer should be inserted in place of question mark.

an induced current is developed in it Some magnetic flux is changed from a coil of resistance 10Ω. As a result which varies with time as shown in figure. Find the magnitude of the change in flux through the coil in weber.