Multiconcept Exercise 19.58 A beam of protons is accelerated easterly from rest

Question

Multiconcept Exercise 19.58 A beam of protons is accelerated easterly from rest through a potential difference of 5.0kV . It enters a region where there exists an upward pointing uniform electric field? This field is created by two parallel plates separated by 20cm with a potential difference of 250 V across them. Part A What is the speed of the protons as they enter the electric field? Express your answer using two significant figures. v= 9.8 x 10^5 m/s Part B Find the magnitude of the magnetic field (perpendicular to E) needed so the beam passes undeflected through the plates. Express your answer using two significant figures. B= __________ mT (_Submit My Answers Grve Up

Explanation / Answer

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apply magnetic fiedl B = E/v

E = V/d

E = 250/0.2

E = 1250 V/m

s0 B = 1250/9.8 e5

B = 1.27 *10^-3 T   or 1.27 mT
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