Inductor Serial Resistance for DC step

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Mustafatarhan49

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Hello all,

I have a problem to find out the serial resistance of the inductance for the DC step. I have inductor value of 340uh, input voltage of 12V and inductor current of 30A after 1.2ms. can you please help me to find this value!
Thanks!
 

solve the equation -

IR/V = 1 - e^(- tR/L)

you should get R around 0.195 ohms or so
 

can you please write the steps how you have found 0.195. I could not get rid of the equation ?
 

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