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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > In the plane mirror, the coordinates of image of a charged particle (initially at origin as shown in fig. after two and a half time periods are (initial velocity of charge particle v0 in the x-y plane and the plane mirror is perpendicular to the x-axis. A uniform magnetic field Biˆ exists in the space. P0 is pitch of helix, R0 is raduis of helix.)

In the plane mirror, the coordinates of image of a charged particle (initially at origin as shown in fig. after two and a half time periods are (initial velocity of charge particle v0 in the x-y plane and the plane mirror is perpendicular to the x-axis. A uniform magnetic field Biˆ exists in the space. P0 is pitch of helix, R0 is raduis of helix.)

An electron is accelerated from rest through a potential difference V. This electron experiences a force F in a uniform magnetic field. On increasing the potential difference to V' In the plane mirror the force experienced by the electron in the same magnetic field becomes 2F. Then the ratio (V'/V) is equal to