If a bar magnet is divided into two equal pieces, the north and south poles are

Question

If a bar magnet is divided into two equal pieces, the north and south poles are separated. two magnets result. the magnet properties arc destroyed. an electric field is created. A horizontal wire carries a current straight toward you. From your point of view, the magnetic field caused by this current points directly away from you. points to the left. circles the wire in a clockwise direction. circles the wire in a counter-clockwise direction. The SI unit of magnetic field is the weber. gauss. tesla. lorentz. At double the distance from a long current-carrying wire, the strength of the magnetic field produced by that wire decreases to 1/8 of its original value. 1/4 of its original value. 1/2 of its original value. none of the above.Two long parallel wires are placed side-by-side on a horizontal table. If the wires carry current in opposite directions. one wire is lifted slightly as the other is forced against the table's surface. both wires are lifted slightly. the wires attract each other. the wires repel each other.

Explanation / Answer

1 )

B option

when you cut the magnet in half , new south and north pole create , so a new magnet

2)

D option

3 )

SI unit for magnetic field = Tesla (T)

webber is for magnetic flux

4)

B is directly proportional to 1/r

now distance is double

B' = B/2 (c option )

5 )

repel each other

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