Be sure to review Examples $25\mathrm{.}2$ and $25\mathrm{.}3($Section $25\mathrm{.}3)$ before attempting these problems.

VP $25\mathrm{.}3\mathrm{.}1$

Part A

Some airliners use wires of aluminum $($resistivity $2\mathrm{.}751082\mathrm{.}75108$m$$m$)$ rather than copper to reduce weight. The potential difference between the ends of an aluminum wire $37\mathrm{.}0$ mm long is $1\mathrm{.}45$ VV when the wire carries current $1\mathrm{.}20$ AA$.$ Find the electric$-$field magnitude inside the wire.

Express your answer with the appropriate units.

Activate to select the appropriates template from the following choices. Operate up and down arrow for selection and press enter to choose the input value typeActivate to select the appropriates symbol from the following choices. Operate up and down arrow for selection and press enter to choose the input value type

EE $=$

nothingnothing

SubmitRequest$$Answer

Part B

Find the resistance of the wire.

Express your answer with the appropriate units.

Activate to select the appropriates template from the following choices. Operate up and down arrow for selection and press enter to choose the input value typeActivate to select the appropriates symbol from the following choices. Operate up and down arrow for selection and press enter to choose the input value type

RR $=$

nothingnothing

SubmitRequest$$Answer

Part C

Find the cross$-$sectional area of the wire.

Express your answer with the appropriate units.

Activate to select the appropriates template from the following choices. Operate up and down arrow for selection and press enter to choose the input value typeActivate to select the appropriates symbol from the following choices. Operate up and down arrow for selection and press enter to choose the input value type

AA $=$

nothingnothing