IP A beam of protons with various speeds is directed in the positive direction. The beamenters a region with a uniform magnetic field of magnitude 0.44 T pointing in the negative zdirection, as indicated in the figure(Figure 1). It is desired to use a uniform electric field (inaddition to the magnetic field) to select from this beam only those protons with a speed of1.42 x 10 m/s-that is, only these protons should be undeflected by the two fields.FigureⓇ@434V2.5 cm< 1 of 1 >▶Part BPart CPart DWhich plate in the figure (top or bottom) should be positively charged?ⒸtopO bottomSubmit✓ CorrectPart EPrevious AnswersExplain.Essay answers are limited to about 500 words (3800 characters maximum, including spaces).3800 Character(s) remainingSubmitProvide FeedbackRequest Answer

Direction of photon = +x Direction of Magnetic field = -zDirection of Electric field = -yMagnitude…

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