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P type semiconductor coil

  1. Mar 1, 2010 #1

    crx

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    P type semiconductor coil....

    The magnetic field orientation in a P type semiconductor wire, in which a DC current is flowing will be caused by the direction of movement of the electrons or the positive holes?
     
  2. jcsd
  3. Mar 2, 2010 #2

    marcusl

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    Re: P type semiconductor coil....

    Is this a homework problem? If so please show your attempt at a solution.
     
  4. Mar 2, 2010 #3

    crx

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    Re: P type semiconductor coil....

    no it is not a homework problem.....i would say the magnetic field orientation is given by the electron movement, but i need an exact answer and not opinions...thanks
     
    Last edited: Mar 2, 2010
  5. Mar 2, 2010 #4

    marcusl

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    Re: P type semiconductor coil....

    The answer is--it doesn't matter. If holes flow from left to right, the current flow is said to be in the same direction. A current in that direction corresponds to electrons flowing from right to left. It is the direction of current flow that matters, the carriers will sort themselves out.
     
  6. Mar 2, 2010 #5

    crx

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    Re: P type semiconductor coil....

    Thank you Marcus , but this was an opinion...Considering the real direction of the electrons (negative charges), in a metallic wire conductor with the ends connected to a DC voltage, the magnetic field orientation will correspond to the "right hand grip rule". Now if we replace the metallic wire with a P type semiconductor wire (in which positive holes are the major carriers), the orientation of the B vector will be the same as the metallic wire or will be opposite?
     
  7. Mar 2, 2010 #6

    marcusl

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    Re: P type semiconductor coil....

    The voltage source drives a current in the same direction both times, regardless of the type of carriers involved. Therefore B is the same each time.
     
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