As said in the video, gravity and electricity are similar. When talking about gravity, we have the HEAVY BALL and the GROUND (earth). Gravitational force
causes the BALL to want to be close to the GROUND. When talking about electricity, we have the PLUS CHARGE
and the MINUS CHARGE
. Electrical force
causes the CHARGES to want to be close to each other.
When we lift the ball off the ground, we are giving it what we call GRAVITATIONAL POTENTIAL ENERGY
. In much the same way, when we pull the plus charge away from the minus charge, we are giving it ELECTRICAL POTENTIAL ENERGY
. The amount of energy increases the higher we lift the ball up or the farther away we pull the plus charge. When released, the ball will rush back to the ground and the plus charge will rush back to the minus charge.
Lifting the ball off the ground gives it some HEIGHT
. Pulling the plus charge away from the minus charge gives it some DISTANCE
. This distance measures VOLTAGE.
The farther away
we pull the plus charge from the minus charge, the greater
the voltage is.