- #1
asdf1
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if you model a RL-circuit, the correct answer should be L(dI/dt)+RI=V
but why doesn't the "I" in "RI" have to be "dI"?
but why doesn't the "I" in "RI" have to be "dI"?
Think of two circuits; one with just a resistor and one with just an inductor (ideal with no resistance).asdf1 said:no, but in that case there is an inductor,
so shouldn't the "I" be "dI"?
In a model RL circuit, "RI" is used to represent the voltage drop across the resistor, while "dI" represents the change in current. This is because the resistor has a constant resistance, while the current can change over time. Therefore, using "RI" allows for a more accurate representation of the voltage in the circuit.
The value of "RI" in a model RL circuit is calculated using Ohm's Law, which states that the voltage drop across a resistor is equal to the product of the resistance and the current flowing through it. Therefore, "RI" is equal to the resistance value of the resistor multiplied by the current in the circuit.
In a model RL circuit, "RI" and "dI" can only be equal if the current in the circuit is constant. This would mean that there is no change in the current over time, and therefore the representation of the voltage using "RI" would be equivalent to the change in current using "dI". However, in most cases, the current will not be constant and therefore "RI" and "dI" will not be equal.
The resistor in a model RL circuit is responsible for limiting the flow of current in the circuit. It is used to control the voltage and current in the circuit and prevent it from becoming too high, which can cause damage to the circuit components. The resistance value of the resistor is also used in calculations to determine the voltage drop across it.
In a model RL circuit, the components are ideal and do not take into account factors such as resistance in the wiring, capacitance, and inductance of the components. In a real RL circuit, these factors can affect the behavior of the circuit and may need to be taken into consideration in calculations. Additionally, real circuits may have additional components such as capacitors or diodes that can affect the overall behavior of the circuit.