The wire runs into/out of page. Calculate i L x B.clovergogo said:http://upload.lsforum.net/users/public/m28175Untitledw43.jpg
Q 21 why the is not downward?? it gains weight!
Q22 why the direction is not out of paper, by right hand grip rule, 4 sides of the wire can produce a B-field which is out of paper!?
A B-field, also known as a magnetic field, is a physical phenomenon that describes the force exerted by a magnet or electric current on other moving charges or magnets.
When electric current flows through a wire, it creates a circular magnetic field around it. When the wire is formed into a loop, the magnetic fields from each side combine to create a stronger B-field.
The strength of the B-field produced by 4 sides of wire depends on the amount of current flowing through the wires, the distance between the wires, and the material the wire is made of.
The direction of the B-field is determined by the direction of the current flow in the wire. The right-hand rule can be used to determine the direction of the B-field in relation to the direction of the current flow.
The production of B-fields by 4 sides of wire has a wide range of practical applications, including in electromagnets, electric motors, generators, and magnetic resonance imaging (MRI) machines. It is also used in everyday devices such as speakers, headphones, and computer hard drives.