## Physics: Principles with Applications (7th Edition)

Published by Pearson

# Chapter 16 - Electric Charge and Electric Field - Questions: 1

#### Answer

By comparing to a known charge.

#### Work Step by Step

Another object of known charge must be brought near the comb, as in Figure 16-2. If they repel, then the comb has the same charge as the object, and if they attract, the two objects have opposite sign.

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