A vertical wire carries an upward current. An electron beam travelling horizontally towards the wire will be deflected

Step-by-step solution

Let the vertical wire be placed along the y-axis with the current I flowing in the + j direction (upwards). Let the electron beam travel horizontally along the x-axis towards the wire. Its velocity vector is v = -v i . According to the right-hand thumb rule, the magnetic field B produced by the current-carrying wire at a point on the positive x-axis is directed outwards, i.e., in the + k direction. The magnetic force acting on the moving electron is given by the Lorentz force formula: F = q( v B ) Substituting the