he answer.

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$1.$

A long solenoid with $9\mathrm{.}50{10}^2$ turns per meter and radius $2\mathrm{.}00$ cm carries an oscillating current $I=8\mathrm{.}00sin80t,$ where I is in amperes and $t$ is in seconds.

$($a$)$ What is the electric field induced at a radius $r=1\mathrm{.}00cm$ from the axis of the solenoid? $($Use the following as necessary: $t.$ Let $E$ be measured in millivolts$/$meter and $t$ be measured in seconds.$)$

$E=$

$($b$)$ What is the direction of this electric field when the current is increasing counterclockwise in the solenoid?

clockwise

counterclockwise