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Charge and current

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Question 2

A student sets up a circuit where a current flows through a series combination of a metallic copper wire and a semiconductor wafer.

Which row in the table correctly identifies the charge carriers responsible for the current in the copper wire and in the semiconductor?

Charge carriers in the copper wireCharge carriers in the semiconductor
AFree electronsElectrons and holes
BFree electronsFree electrons only
CPositive ionsElectrons and holes
DFree electrons and positive copper ionsPositive and negative ions

Row A

Row B

Row C

Row D

Charge and current Questions

  1. A Level
  2. /Physics
  3. /Charge and current