Direction of ?⃗: For each of the following find the direction of?, ?? ?? , and ?.
(a) An infinite sheet in the ?-? plane that has current density? = ?? Ì‚?. Find the directions of the fields:
i. above the sheet
ii. below the sheet
(b) A long solenoid that has a current that changes linearlyfrom ? = ??̂to ? = −??̂in some time ? . Find the directions of thefields:
i. inside the solenoid
ii. outside the solenoid
(c) A long thin wire along the ?-axis has a constant current ?Ì‚? running through it. The current is suddenly turned off such thatit decreases to zero in a short amount of time. (Assume thedecrease in current is linear). Find the directions of thefields:
i. before the current is turned off
ii. after the current has reached zero
