the magnetic field produced by a current in a straight wire has no poles-true or false?

Answer 1

false. I hope you remember electromagnet which run on this property and every magnet no matter what, will always have two poles otherwise ther would be no field or current flowing through.

Answer 2

As field lines are concentric circles for the magnetic field around a current carrying straight wire, then no, there technically are no poles.

The poles achieved by an electromagnet are due to the coiling of the wire superimposing the field from each section on the next, and the iron core giving ends to the magnet whilst also 'strengthening' the field.

Answer 3

True. The magnetic field around a straight wire consists of closed circles surrounding the wire. There is no termination point for a north or south pole. However, if you were to insert a piece of iron next to the wire, then magnetic poles will form in the iron.

An electromagnet does not use straight wire, but circular wire surrounding a metal core. North and south poles are induced into that metal core.

Answer 4

This is a trick question. There are no poles that can be identified. The configuration is like east and west. There are no "east west" poles. The magnetic field is configured to flow around the wire. No beginning or end. Just a circular field.

Answer 5

It produces a circular magnetic field, where the lines of force close upon themselves, in each cross section of a surrounding tube, with the wire running along its center.

Answer 6

The formula for the sector around an prolonged at once cord is B=µ/2?*I/d and those questions could be responded in terms of this. A) the sector isn't uniform. The extra away you get, the weaker the sector; B) See above C) container strains are around around the cord. Use the wonderful-hand grip rule. Thumb is direction of (customary) contemporary, container strains flow interior the path of the curl of your arms. D)See above E) superb

Answer 7

true