Answer Happy

A 180 V battery is connected across two parallel metal plates of area 28.5 cm² and separation 8.20 mm. A beam of alpha particles (charge +2e, mass 6.64 x 10-27 kg) is accelerated from rest through a potential difference of 1.75 kV and enters the region between the plates perpendicular to the electric field, as shown in (Figure 1). Figure 물 < 1 of 1 Part A What magnitude of magnetic field is needed so that the alpha particles emerge undeflected from between the plates? Express your answer with the appropriate units. |B| = Submit Part B μà Value Submit + Provide Feedback Request Answer What is the direction of this magnetic field? O The magnetic field is directed upward. O The magnetic field is directed into the page. O The magnetic field is directed out of the page. O The magnetic field is directed downward. Units Request Answer ? Review | Constants Next >