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whoknows12345
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A beam of protons with various speeds is directed in the positive x direction. The beam enters a region with a uniform magnetic field of magnitude 0.45 T pointing into the page, as indicated in Figure 22-45. It is desired to use a uniform electric field (in addition to the magnetic field) to select from this beam only those protons with a speed of 1.60 105 m/s; that is, only these protons should be undeflected by the two fields.
(a) Determine the electric field that yields the desired result.
size: ____72000___ N/C
dir: -y dir
(b) Suppose the electric field is to be produced by a parallel-plate capacitor with a plate separation of 2.5 cm. What potential difference is required between the plates?
________ V
for part B, I understand that C=EA/d and V=IR
also, I can find I, by that I can use I=2pieRB/(4pie x 10^-7)
but I am really not sure how to find this potential difference correctly, can anyone help?
(a) Determine the electric field that yields the desired result.
size: ____72000___ N/C
dir: -y dir
(b) Suppose the electric field is to be produced by a parallel-plate capacitor with a plate separation of 2.5 cm. What potential difference is required between the plates?
________ V
for part B, I understand that C=EA/d and V=IR
also, I can find I, by that I can use I=2pieRB/(4pie x 10^-7)
but I am really not sure how to find this potential difference correctly, can anyone help?