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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > In the x-y-plane, the region y>0 has a uniform magnetic field B 1 k ^ and the region y<0 has another uniform magnetic field B 2 ​ k ^ . A positively charged particle is projected from the origin along the positive y-axis with speed V o = π m/s at t = 0, as shown in the figure. Neglect gravity in this problem. Let t = T be the time when the particle crosses the x-axis from below for the first time. If B 2 ​ =4B 1 ​ , the average speed of the particle, in m/s , along the x-axis in the time interval T is ________.

In the x-y-plane, the region y>0 has a uniform magnetic field B 1 k ^ and the region y<0 has another uniform magnetic field B 2 ​ k ^ . A positively charged particle is projected from the origin along the positive y-axis with speed V o = π m/s at t = 0, as shown in the figure. Neglect gravity in this problem. Let t = T be the time when the particle crosses the x-axis from below for the first time. If B 2 ​ =4B 1 ​ , the average speed of the particle, in m/s , along the x-axis in the time interval T is ________.

In the x-y-plane is m and the magnetic field at the centre of the loop is B1 . When the dipole moment is doubled by keeping the current constant The dipole moment of a circular loop carrying a current I the magnetic field at the centre of the loop is B2 . The ratio B1/B2 is: