Engineering Electric Circuit Analysis of this First Order R-L Circuit

[Xiao Xiao]

Homework Statement

Finding the current at (a) the instant just before the switch opens (b) the instant just after the switch opens.

Relevant Equations

iL before switch open is i+(0) and iL after the switch opens is i-(0), and i(0)=i+(0)=i-(0) so both have the same value?

 

[BvU]

Is that really a relevant equation ?

Or just a wild guess.

Please post a realistic attempt at solution, so we can help (PF guidelines forbid us unless...)

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[Xiao Xiao]

Is that really a relevant equation ?

Or just a wild guess.

Please post a realistic attempt at solution, so we can help (PF guidelines forbid us unless...)

$\$

It isn't exactly a related equation but I couldn't leave it empty so I put it there, i have attempted a solution on my own, but my question is just if the current at the instant before the switch opens=the current at the instant right after the switch opens. I just want to know if that's correct or not because it's relevant if I want to continue solving the rest of the question with my solution.

 

[Xiao Xiao]

Is that really a relevant equation ?

Or just a wild guess.

Please post a realistic attempt at solution, so we can help (PF guidelines forbid us unless...)

$\$

Okay, my professor's lecture was very confusing and didn't properly explain initial conditions, but now I used outside sources to study and my confusion about the question is cleared so I'll delete this in a bit.
Edit: I guess deleting questions doesn't work.

 

[BvU]

It isn't exactly a related equation but I couldn't leave it empty so I put it there, i have attempted a solution on my own, but my question is just if the current at the instant before the switch opens=the current at the instant right after the switch opens. I just want to know if that's correct or not because it's relevant if I want to continue solving the rest of the question with my solution.

You have picked up the essential part of this exercise: the inductance will behave in such a way that a change in current is counter-acted, according to the relationship $$V = L{di\over dt}$$so: bravo, well done !

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