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No. You use the right concept whenever you need to use it. There is no preference of "power" over "energy". For example, the energy stored by a cap is equal to ${1\over 2} C V^2$. This is often us...
Answer
#3: Post edited
by
coquelicot
·
2021-03-20T18:47:22Z (about 3 years ago)
- No. You use the right concept whenever you need to use it. There is no preference of "power" over "energy".
- For example, the energy stored by a cap is equal to ${1\over 2} C V^2$. This is often used in computations.
- It's also the energy you have wasted that you have to pay to your electricity provider.
- On the other hand, power is useful to know how much heat is dissipated by resistors and like; this is why it is very often needed in electrical engineering.
- No. You use the right concept whenever you need to use it. There is no preference of "power" over "energy".
- For example, the energy stored by a cap is equal to ${1\over 2} C V^2$. This is often used in computations.
- It's also the energy you have wasted that you have to pay to your electricity provider.
- On the other hand, power is useful to know how much heat is dissipated by resistors and like; this is why it is very often needed in electrical engineering.
- ADDED:
- Perhaps most importantly, it is pointless to say "this circuit uses such quantity of energy during such amount of time": you just don't want to involve time into the expression of the circuit energy consumption. The time is an arbitrary choice of the user. It is much more pertinent to provide the power dissipated by the circuit, in order for the user to be able to obtain the energy by multiplying by the working time if he wishes.
#2: Post edited
by
coquelicot
·
2021-03-20T18:30:08Z (about 3 years ago)
No. You use the right concept whenever you need to use it. There is no "preference" of power over "energy".- For example, the energy stored by a cap is equal to ${1\over 2} C V^2$. This is often used in computations.
- It's also the energy you have wasted that you have to pay to your electricity provider.
- On the other hand, power is useful to know how much heat is dissipated by resistors and like; this is why it is very often needed in electrical engineering.
- No. You use the right concept whenever you need to use it. There is no preference of "power" over "energy".
- For example, the energy stored by a cap is equal to ${1\over 2} C V^2$. This is often used in computations.
- It's also the energy you have wasted that you have to pay to your electricity provider.
- On the other hand, power is useful to know how much heat is dissipated by resistors and like; this is why it is very often needed in electrical engineering.
#1: Initial revision
by
coquelicot
·
2021-03-20T18:28:35Z (about 3 years ago)
No. You use the right concept whenever you need to use it. There is no "preference" of power over "energy".
For example, the energy stored by a cap is equal to ${1\over 2} C V^2$. This is often used in computations.
It's also the energy you have wasted that you have to pay to your electricity provider.
On the other hand, power is useful to know how much heat is dissipated by resistors and like; this is why it is very often needed in electrical engineering.