Give an equation for the force F experienced by an electron travelling in vacuum at right- angles to a magnetic field B, and state its direction. Explain each term in the equation

A proton moves perpendicular to the magnetic field of 0.5 T. The track is observed to be a circular arc of radius 2.0 cm. Find: a) The direction of the force acting on the proton? b) The velocity of the proton c) The kinetic energy of the moving proton d) The magnitude of the force acting on the proton

ements valuación An electron moves in a uniform circular motion under the action of an external magnetic field perpendicular to the circular path. Consider that the charge and mass of the electron are respectively q = 1.6 x 10-¹⁹ C, m = 9.11 10-31 Kg, the velocity of the electron is v = = 2.8 × 107 and the magnitude of the external magnetic field is B = 2.1 x 10-³T. Calculate the radius R of the circle formed by the electron in its path during its displacement and choose the correct option. 5.5 cm O 7.5 cm 9.5 cm O 3.5 cm 1 pts Question 3

A wire of mass 10 grams and length 50 cm carries a Southward current of 2A while resting on a horizontal table on Earth.  a) If a vertically downward uniform magnetic field of 0.2 T is applied, determine the direction and magnitude of the magnetic force on the wire.  b) Determine the acceleration of the wire if its coefficient of kinetic friction with the table is 0.4.  c) Determine the direction and magnitude of the smallest uniform magnetic field required to levitate the wire.