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(a) A velocity selector consists of electric and magnetic fields described by the expressions E→ = Ek^ and B→ = Bj^, with B = 22.0 mT. Find the value of E (in kV/m) such that a 740 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→ = Ek^ and B→ = Bj^, with B = 22.0 mT. Find the value of E (in kV/m) such that a 740 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 E → = E k ^ and B → = B j ^ , with B = 22.0 m T . Find the value of E (in k V / m ) such that a 740 e V electron moving in the negative x -direction is undeflected. k V / 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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