- #1
ilovescience85
- 25
- 0
Good afternoon all,
I recently submitted a assignment and my lecturer has questions a figure i have put as an answer.
Question was; An inductor of negligible resistance and an inductance of 0.2 H is connected in series with a 330 Ω resistor to a 12V d.c. supply.
Determine: the resistance of a 0.2 H coil used to replace the inductor if the circuit’s time constant falls to 0.55 ms.
I used R=L/t = 0.2/0.00055 = 363.64ohms
circuit original resistance is 330Ω so an additional 63.64Ω would be apostioned to the new coil? He has asked where the 63.64ohms has come from??
Am i right in what I've siad or have i totally misunderstood?
Any help would be great, i still passed the assignment but just want to be sure.
Thanks
I recently submitted a assignment and my lecturer has questions a figure i have put as an answer.
Question was; An inductor of negligible resistance and an inductance of 0.2 H is connected in series with a 330 Ω resistor to a 12V d.c. supply.
Determine: the resistance of a 0.2 H coil used to replace the inductor if the circuit’s time constant falls to 0.55 ms.
I used R=L/t = 0.2/0.00055 = 363.64ohms
circuit original resistance is 330Ω so an additional 63.64Ω would be apostioned to the new coil? He has asked where the 63.64ohms has come from??
Am i right in what I've siad or have i totally misunderstood?
Any help would be great, i still passed the assignment but just want to be sure.
Thanks