Which one ? Please explain. Thanks a lot! In a semiconductor, there are an equal

Question

Which one ? Please explain. Thanks a lot! In a semiconductor, there are an equal number of mobile electrons and mobile "quasi-particles" that behave almost identically to electrons except with a charge +e instead of -e. If a section of semiconductor carries a net current of 32 mu A to the right, which statement below best describes (he motion of the electrons? 4 times 10^14 electrons/s flow to the right 1 times 10^14 electrons/s flow to the right 4 times 10^14 electrons/s flow to the left 1 times 10^14 electrons/s flow to the left

Explanation / Answer

here ,

the net current , I = 32 uA

I = 32 * 10^-6 A

the number of electrons per seccond , n = I /e

n = 32 * 10^-6 /( 1.6 * 10^-19) electrons/s

n = 2 * 10^14 electrons /s

half current is due to electrons and half due to quasi particles

so,

for the current carried , d) 1*10^14 electrons /s flows to the left

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