- #1
fisico30
- 374
- 0
Dear Forum,
let's consider a certain load. The load has its own internal structure (resistors, capacitors, etc...).
I would think that to give the load the most power, we need to provide the load terminals with the largest voltage. The current in the load will then be a consequence. Power is always P=VI.
From the outside we always have control of the voltage: for instance, if we connect a certain device to a solar panel, we want the solar panel to emit the largest voltage. That way the load will receive the largest power...
In a household, two different incandescent light bulbs are connected to the same voltage, 120 V. That is fixed. but the power ratings of the bulbs are different because the resistances of the bulbs are different: the bulb with the smallest resistance will emit the most power...
Moral of the story: if we want to send the most power to that load and we have control on the input voltage, the higher the voltage the higher the power, correct?
Any caveat?
High voltage means high power then. But there is also the maximum power transfer theorem...
Thanks
fisico30
let's consider a certain load. The load has its own internal structure (resistors, capacitors, etc...).
I would think that to give the load the most power, we need to provide the load terminals with the largest voltage. The current in the load will then be a consequence. Power is always P=VI.
From the outside we always have control of the voltage: for instance, if we connect a certain device to a solar panel, we want the solar panel to emit the largest voltage. That way the load will receive the largest power...
In a household, two different incandescent light bulbs are connected to the same voltage, 120 V. That is fixed. but the power ratings of the bulbs are different because the resistances of the bulbs are different: the bulb with the smallest resistance will emit the most power...
Moral of the story: if we want to send the most power to that load and we have control on the input voltage, the higher the voltage the higher the power, correct?
Any caveat?
High voltage means high power then. But there is also the maximum power transfer theorem...
Thanks
fisico30