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HydroGuy
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In University we almost always deal with voltage sources that can supply whatever current needed. What determines the amount of power "drawn", is it purely the resistance? How do we design for low-power?
HydroGuy said:So... the key to low power is to have a very high load impedance?
Power in a circuit refers to the rate at which energy is transferred or converted in an electrical system. It is measured in watts (W) and is calculated by multiplying the voltage by the current.
To calculate power in a circuit, you can use the formula P = VI, where P is power in watts, V is voltage in volts, and I is current in amps. Alternatively, you can also use the formula P = I^2 * R, where R is the resistance in ohms.
The relationship between power, voltage, and current in a circuit is described by Ohm's Law, which states that P = VI. This means that power is directly proportional to both voltage and current. In other words, increasing the voltage or current in a circuit will result in an increase in power.
The amount of power in a circuit can affect the components in different ways. For example, too much power can cause components to overheat and potentially fail, while too little power may not provide enough energy for the components to function properly. It is important to properly calculate and regulate power in a circuit to prevent damage to components.
There are a few ways to increase or decrease power in a circuit. One way is to change the voltage or current, as they are directly proportional to power. Another way is to add or remove components, which can affect the overall resistance of the circuit and therefore alter the power. Additionally, using different types of components with different power ratings can also impact the power in a circuit.