Checking Current in RL Circuit at t=0 - Typo Found?

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In summary, an RL circuit is an electrical circuit consisting of a resistor and an inductor connected in series. To check the current in an RL circuit at t=0, a multimeter can be used to measure the voltage across the inductor and Ohm's law can be applied. This allows for understanding of the circuit's behavior at the initial moment and can aid in troubleshooting and predicting performance. However, a typo can affect the current measurement, so it is important to double-check all values and calculations. Common mistakes when checking the current in an RL circuit at t=0 include using the wrong formula, entering incorrect values, and forgetting to account for initial inrush current. It is also crucial to ensure proper circuit connection and function before taking
  • #1
marstery
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I have an example where a 5v dc source is connected to a 10mh inductor then to 1k and 2k resistors in parallel.

In finding the current through the inductor at t=0:

written is:
IL(0) = 5v / (2/3k) = 7.5 ma

what i got was:
IL(0) = 5v / (3/2k) = 3.3 ma

I'm just checking to make sure i haven't lost mind or missed something.
 
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  • #2
The parallel combination of a 1k and 2k resistor is 1/(1+0.5) = 2/3. I think you just forgot the extra 1/ part?
 
  • #3
right.
 

FAQ: Checking Current in RL Circuit at t=0 - Typo Found?

What is an RL circuit?

An RL circuit is an electrical circuit that consists of a resistor (R) and an inductor (L) connected in series. It is used to store and release energy in the form of an electromagnetic field.

How do you check the current in an RL circuit at t=0?

To check the current in an RL circuit at t=0, you can use a multimeter to measure the voltage across the inductor. The current can then be calculated using Ohm's law (I = V/R) and the known resistance of the circuit.

What is the significance of checking the current in an RL circuit at t=0?

Checking the current in an RL circuit at t=0 allows you to understand the behavior of the circuit at the initial moment when the circuit is switched on. This can help in troubleshooting and predicting the overall performance of the circuit.

Can a typo affect the current measurement in an RL circuit at t=0?

Yes, a typo can affect the current measurement in an RL circuit at t=0. If the value entered for the resistance or inductance is incorrect, the calculated current will also be incorrect. It is important to double-check all values and calculations to ensure accurate measurements.

What are some common mistakes when checking the current in an RL circuit at t=0?

Some common mistakes when checking the current in an RL circuit at t=0 include using the wrong formula, entering incorrect values, and forgetting to account for the initial inrush current. It is also important to ensure that the circuit is properly connected and functioning before taking any measurements.

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