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Question 20N.1.SL.TZ0.18

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Date November 2020 Marks available [Maximum mark: 1] Reference code 20N.1.SL.TZ0.18
Level SL Paper 1 Time zone TZ0
Command term Question number 18 Adapted from N/A
18.
[Maximum mark: 1]
20N.1.SL.TZ0.18

A metal wire has n free charge carriers per unit volume. The charge on the carrier is q. What additional quantity is needed to determine the current per unit area in the wire?

A.  Cross-sectional area of the wire

B.  Drift speed of charge carriers

C.  Potential difference across the wire

D.  Resistivity of the metal

[1]

Markscheme

B

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