Which statement describes the magnetic field inside a bar magnet? a) it points from north to south. b) it points from south to north. c) it forms loops inside the magnet. d) there is no field within the magnet.

Answer

B) It points from south to north.

Explanation

The magnetic fields are imaginary lines/paths that forms the magnetic strength. These fields move from north to south outside the magnet.

In side the magnet fields points south to north.

The fields inside the magnet move from south to north, then they image from north pointing to south from outside.  

B) It points from south to north.

hope this helped

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.