Question

what will happen
1) the current wire reverse
2) magnetic field bar.​

Answer 1

$\huge\frak\red{AnSwer}$

The direction of magnetic field in a current carrying wire is in the direction your fingers if you wrap your hand around the wire with your thumb in the direction of current. Thus, if current is reversed, the direction of magnetic field is also reversed.

❤️ʜᴏᴩᴇ ᴛʜɪꜱ ʜᴇʟᴩᴇᴅ yᴏᴜ❤️