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(a) A velocity selector consists of electric and magnetic fields described by the expressions E - ER and B - 8j, with B = 21.0 mT. Find the value of E (in kV/m) such that a 720 ev electron moving in the negative x-direction is undeflected. kV/m (b) What If? For the value of E found in part (a), what would the kinetic energy of a proton have to be (in MeV) for it to move undeflected in the negative x-direction? MeV

(a) A velocity selector consists of electric and magnetic fields described by the expressions E - ER and B - 8j, with B = 21.0 mT. Find the value of E (in kV/m) such that a 720 ev electron moving in the negative x-direction is undeflected. kV/m (b) What If? For the value of E found in part (a), what would the kinetic energy of a proton have to be (in MeV) for it to move undeflected in the negative x-direction? MeV

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(a) A velocity selector consists of electric and magnetic fields described by the expressions É = ER and B = 8j, Wwith B = 21.0 mT. Find the value of E (in kV/m) such that a 720 ev electron moving in the negative x-direction is undeflected. kV/m (b) What If? For the value of E found in part (a), what would the kinetic energy of a proton have to be (in MeV) for it to move undeflected in the negative x-direction? MeV
Transcribed Image Text:(a) A velocity selector consists of electric and magnetic fields described by the expressions É = ER and B = 8j, Wwith B = 21.0 mT. Find the value of E (in kV/m) such that a 720 ev electron moving in the negative x-direction is undeflected. kV/m (b) What If? For the value of E found in part (a), what would the kinetic energy of a proton have to be (in MeV) for it to move undeflected in the negative x-direction? MeV
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