why ia voltage constant in parallel combination
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voltage is constant in parallel combination because resistors are connected in parallel and all resistors met at two points . let we name the points as a and b and when we measure the potential difference then we find the potential difference between two points A and B . then the points A and B are same in parallel combination and in series combination resistors are joined in series way and their registers are meeting at the points A B C D etc. therefore the potential divides in series. combination
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For a fair comparison, compare it to gravity.
Voltage is a measure of potential energy (or energy per charge, or Joules per Coulomb). Gravity has potential energy in the same way -- potential energy equals mass * height * acceleration constant, or mgh.
Let's move that mass up (give it some potential energy), then drop it down, then move it around and then put it back in the same place it was before.
When it's back in the same place, the gravitational potential energy is the same as it was before -- mgh.
The same goes for voltage. Take any path you choose, around in any directions and through whatever paths you pick. When you end up back in the place you started, the potential energy must be the same.
This gives us Kirchoff's voltage law: The sum of the voltages in a loop (that is, the sum of how the potential energy changes along a path that comes back to its original point) must equal zero.
Voltage is a measure of potential energy (or energy per charge, or Joules per Coulomb). Gravity has potential energy in the same way -- potential energy equals mass * height * acceleration constant, or mgh.
Let's move that mass up (give it some potential energy), then drop it down, then move it around and then put it back in the same place it was before.
When it's back in the same place, the gravitational potential energy is the same as it was before -- mgh.
The same goes for voltage. Take any path you choose, around in any directions and through whatever paths you pick. When you end up back in the place you started, the potential energy must be the same.
This gives us Kirchoff's voltage law: The sum of the voltages in a loop (that is, the sum of how the potential energy changes along a path that comes back to its original point) must equal zero.
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