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vg19
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I am having trouble figuring out the answer to one MCQ question.
An electron with velocity = 2.0 x 10^6 i m/s enters a region with electric field E = 200 j V/m. Because there is also a magnetic field present, the electron follows a straight line path at a constant velocty. The magnetic field could be:
a) B = (-1 x 10^4 k) T
b) B = (4 x 10^8 k) T
c) B = (1 x 10^-4 j) T
d) B = (1 x 10^4 k) T
I am really really confused with this question. Wont the electric field cause the electron to change speeds and direction? Also, the magnetic field can only alter the direction of the electron correct? So, how can the electron follow a straight line path at all?? AHHH I think something is horribly wrong with my logic and any help would be appreciated.
Thanks
An electron with velocity = 2.0 x 10^6 i m/s enters a region with electric field E = 200 j V/m. Because there is also a magnetic field present, the electron follows a straight line path at a constant velocty. The magnetic field could be:
a) B = (-1 x 10^4 k) T
b) B = (4 x 10^8 k) T
c) B = (1 x 10^-4 j) T
d) B = (1 x 10^4 k) T
I am really really confused with this question. Wont the electric field cause the electron to change speeds and direction? Also, the magnetic field can only alter the direction of the electron correct? So, how can the electron follow a straight line path at all?? AHHH I think something is horribly wrong with my logic and any help would be appreciated.
Thanks