Which of the following statements are true about bar magnets?

a. the direction of the magnetic field are considered to flow from the south pole to the north pole around the outside of the magnet.
b. if a bar magnet is cut in half, two new magnets will be formed each with a south and north pole
c. the north pole of a bar magnet will align itself with the south pole of the earth.
d. all magnets have a similar magnetic field as a bar magnet.

b. If a bar magnet is cut in half, two new magnets will be formed each with a south and north pole

Explanation:

As we know that magnetic field lines always originates from north pole of magnet and then terminate at south pole.

Also all magnets must have two poles (i) North pole (ii) South Pole

now if we break a magnet into two parts then this magnet will again form two new poles on the opposite sides so that each half will again have two different poles of magnet

So here we can say that when a bar magnet is cut into two parts then each part will behave like a new magnet.

so correct answer will be

b. If a bar magnet is cut in half, two new magnets will be formed each with a south and north pole

a charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a third charge so it would experience no net electric force? enter an expression for the exact answer, which will involve a square-root sign. (do not enter an approximate decimal answer.)