An electron travelling with a spped `u` along the positive `x-axis` enters into a region of magnetic field where `B= - B_(0)hat (K) (xgt0)`. It comes out of the region with speed `v` then

An electron moving with a speed u along the positive x-axis at y=0 enters a region of uniform magnetic field which exists to the right of y-axis. The electron exits from the region after some time with the speed v at coordinate y, then

An electron moving with a speed u along the positive x-axis at y=0 enters a region of uniform magnetic field which exists to the right of y-axis. The electron exits from the region after some time with the speed v at coordinate y, then

An electron moving with a speed u along the positive x-axis at y=0 enters a region of uniform magnetic field which exists to the right of y-axis. The electron exits from the region after some time with the speed v at coordinate y, then

A particle of mass m and having a positive charge q is projected from origin with speed v_(0) along the positive X-axis in a magnetic field B = -B_(0)hatK , where B_(0) is a positive constant. If the particle passes through (0,y,0), then y is equal to

A particle of mass m and having a positive charge q is projected from origin with speed v_(0) along the positive X-axis in a magnetic field B = -B_(0)hatK , where B_(0) is a positive constant. If the particle passes through (0,y,0), then y is equal to

A moving charged particle q travelling along the positive X-axis enters a uniform magnetic field B. When will the force acting on q be maximum?

A particle of charge q and mass m moving with a velocity v along the x-axis enters the region xgt0 with uniform magnetic field B along the hatk direction. The particle will penetrate in this region in the x -direction upto a distance d equal to