3when a bar magnet moves in a wire loop,
what does the wire loop produce?
a. an electric current
b. electrical resistance
c. ferromagnetic elements
d. magnetic domains

   A. an electric current

When a bar magnet moves inside a wire loop it produces electric current.

Explanation:

Prior to the introduction of the magnet inside the wire loop, the loop doesn’t have any current. When the bar magnet is introduced inside the loop, there develops  a magnetic flux.

When the magnet is moved inside the wire loop the magnetic flux associated with the loop changes and this change induces an electric current.  This happens due to electromagnetic induction whereby a change in magnetic flux induces a current.

The movement of the magnet inside the coil increases and decreases its magnetic flux and this change produces an electric current which can be measured by connecting the coil to a galvanometer.

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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answer a fan shaped mass of sediment deposited at the base of a mountain front do to an abrupt change in stream gradient;