List of top Physics Questions on Magnetic Field asked in AP EAMCET

Two infinitely long wires each carrying the same current and pointing in \(+y\) direction are placed in the \(xy\)-plane, at \(x=-2\,cm\) and \(x=1\,cm\). An electron is fired with speed \(U\) from the origin making an angle of \(+45^\circ\) from the \(x\)-axis. The force on the electron at the instant it is fired is
\[ [B_0 \text{ is the magnitude of the field at origin due to the wire at } x=1\,cm \text{ alone}] \]

Two electrons, \(e_1\) and \(e_2\), of mass \(m\) and charge \(q\) are injected in the perpendicular direction of the magnetic field \(B\) such that the kinetic energy of \(e_1\) is double than that of \(e_2\). The relation of their frequencies of rotation, \(f_1\) and \(f_2\), is