Answer to Question #159816 in Electric Circuits for zain ul abdeen

Question #159816

An electron is accelerated through 2 400 V from rest and then enters a uniform 1.70-T magnetic field. What are (a) the maximum and (b) the minimum values of the magnetic force this particle can experience?


1
Expert's answer
2021-02-08T18:42:03-0500

a)



qU=0.5mv2v=2qUmF=qvBF=qB2qUmF=(1.61019)(1.7)2(2400)(1.61019)(9.11031)=7.91012 NqU=0.5mv^2\\v=\sqrt{\frac{2qU}{m}}\\F=qvB \\F=qB\sqrt{\frac{2qU}{m}}\\F=(1.6\cdot10^{-19})(1.7)\sqrt{\frac{2(2400)(1.6\cdot10^{-19})}{(9.1\cdot10^{-31})}}\\=7.9\cdot10^{-12}\ N

b) If the magnetic field is parallel to the motion of the electron:



F=0 NF=0\ N

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