Question

A thick copper wire 2.3 m long is connected in series to a thin high-resistance Nichrome wire. In the steady state, the conventional current in the thick copper wire is 4 amperes. In this copper wire there are 8 � 10²⁸ mobile electrons per cubic meter and the electron mobility is 4.5 � 10^?3 (m/s)/(V/m). The cross-sectional area of the copper wire is 6 � 10^?7 m2.

The thin high-resistance Nichrome wire (which is connected in series to the thick copper wire) has 6�10²⁸ mobile electrons per cubic meter and the electron mobility is 3�10^?4 (m/s)/(V/m). The cross sectional area of the thin wire is 2�10^?7 m². 1.

a)What is the conventional current in the thin high-resistance Nichrome wire?

b) What is the magnitude of the electric field inside the thick copper wire?

Please show your work

Answer 1

Solution:

a) 3 A

b) 1.16 V/m

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