The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?
the energy stored in the capacitor quadruples its original value.
the energy stored in the capacitor doubles its original value.
the energy stored in the capacitor is decreased to one-fourth of its original value.
the energy stored in the capacitor remains constant.
the energy stored in the capacitor is decreased to one-half of its original value.

The energy stored in the capacitor quadruples its original value.

Explanation:

The energy stored in a capacitor is given by the equation

where

C is the capacitance

V is the voltage across the plates

The capacitance, C, depends only on the properties of the capacitor, so it does not change when the voltage applied is changed.

Instead, in this problem the voltage applied is doubled:

V' = 2V

So the new energy stored is

so, the energy stored has quadrupled.

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explanation:

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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