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9.0×1015 electrons flow through a cross section of silver wire in 290 μs with a drift speed of 9.0×10−4 m/s .

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What is the diameter of the wire?

asked Mar 19, 2016 in PHYSICS by anonymous

1 Answer

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Step 1:

The number of electrons are image.

The drift speed is .

The time is .

The electron number density of silver is .

The number of charge carriers in a volume element is .

.

The circular cross sectional area is .

Substitute in .

.

Step 2:

Find the diameter of the wire.

Substitute image, , and in .

image

image

image

image

image

image

image.

The diameter of the wire is image.

Solution:

The diameter of the wire is image.

answered Mar 19, 2016 by Sammi Mentor

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