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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A straight peice of conducting wire with mass M and length L is placed on a frictionless incline tilited at an angle θ from the horizontal (as shown in fig) There is a uniform. Vertical magnetic field at all points (produced by an arrangement of magnets not shown in fig. To keep the wire from sliding down the incline, a voltage source is

A straight peice of conducting wire with mass M and length L is placed on a frictionless incline tilited at an angle θ from the horizontal (as shown in fig) There is a uniform. Vertical magnetic field at all points (produced by an arrangement of magnets not shown in fig. To keep the wire from sliding down the incline, a voltage source is

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' the force experienced by the electron in the same magnetic field becomes 2F. Then the ratio (V'/V) is equal to