Clements H S
CALC 466
length than Wire . Which of the following correctly compares both the electron drift speed and the magnitude of the electric field within wires and ? (A) and (B) and (C) and (D) and Answer A Correct. The current is the same in each wire. Because the cross-sectional area in Wire is smaller than in Wire , the current density in Wire is greater. This
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Clements H S
length than Wire . Which of the following correctly compares both the electron drift speed and the magnitude of the electric field within wires and ? (A) and (B) and (C) and (D) and Answer A Correct. The current is the same in each wire. Because the cross-sectional area in Wire is smaller than in Wire , the current density in Wire is greater. This means both the drift speed and electric field magnitude must also be greater in Wire , since the material and therefore resistivity and charge-carrier density are the same in each wire. AP PHYSICS C: ELECTRICITY AND MAGNETISM Scoring Guide U
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