Question

Will the drift of electrons change if diameter of wire is halved?

Answer 1

Answer:

Yes. If the resistance for an object is defined as resistivity times length over the cross-sectional area, then decreasing the diameter effectively increases the resistance.

Explanation:

Answer 2

Answer:

Yes. If the resistance for an object is defined as resistivity times length over the cross-sectional area, then decreasing the diameter effectively increases the resistance.

Explanation:

Since the cross sectional current density stays the same, so does the drift velocity. ... If you halve the diameter, you divide the cross sectional area by 4. To maintain the same current, the drift velocity must increase by a factor of 4.