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1. What is the current density in the wire?

2. What is the current if the wire diameter is 0.50 mm?

J = I / A

and I = nqva

What is the answer?

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- Thread starter kyang002
- Start date

- #1

- 22

- 0

1. What is the current density in the wire?

2. What is the current if the wire diameter is 0.50 mm?

J = I / A

and I = nqva

What is the answer?

- #2

ehild

Homework Helper

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kyang002 said:

1. What is the current density in the wire?

2. What is the current if the wire diameter is 0.50 mm?

J = I / A

and I = nqva

What is the answer?

You get from your formulas that the current density is J = nqv.

You should know the meaning of the letters.

n is the number of free carriers in unit volume. q is the charge of the free carriers and v is their drift speed.

Is anything you do not know from these?

ehild

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