Hello to all, I am new to this forum, Im an electrical engineering Tech student in lexington, Ky i stumbled upon this website tonight while frustrated with a homework problem. This website appears to be a great studying resource.
I have a question that im having trouble with.
I apologize ahead of time if i havent provided enough info or a attachment of the circuit; this is my first time posting so any advice is appreciated.
I am givin a simple circuit with a power source of 180V with a switch, a resistor R=60ohm, and an inductor L=3H.
The question is how long is it until current reaches its steady value?
1. The first step i took was finding a time constant T=L/R T=3H/60ohm =50ms
2. I then found source current of the circuit; Is=V/R Is=180v/60ohm = 3A
3. Then I tried setting the source current equal to this equation we learned in class; 3A=(1-e^-x) and x=t/T i dont know what to put in for t.
The solution is 250ms.
My question is, am I using the correct formula? am I attacking this correctly? Am I overthinking this? thank you for any help.
I have a question that im having trouble with.
I apologize ahead of time if i havent provided enough info or a attachment of the circuit; this is my first time posting so any advice is appreciated.
I am givin a simple circuit with a power source of 180V with a switch, a resistor R=60ohm, and an inductor L=3H.
The question is how long is it until current reaches its steady value?
1. The first step i took was finding a time constant T=L/R T=3H/60ohm =50ms
2. I then found source current of the circuit; Is=V/R Is=180v/60ohm = 3A
3. Then I tried setting the source current equal to this equation we learned in class; 3A=(1-e^-x) and x=t/T i dont know what to put in for t.
The solution is 250ms.
My question is, am I using the correct formula? am I attacking this correctly? Am I overthinking this? thank you for any help.