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Q. 3

Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 762

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Short Answer

electrons flow through a cross section of a silver wire in with a drift speed of . What is the diameter of the wire?

The diameter of the wire is .

See the step by step solution

Step by Step Solution

Step 1: Given Information

Number of electrons


Drift speed

Step 2: Explanation

The electron density is

The current density is known to be

The area of a circle is,

Write the area as

Write the electron current and substitute,

Now, substituting this expression for the area at the one for the diameter,

After substituting the values,

Step 3: Final Answer

Hence, the diameter of the wire is

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