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snipaj9696
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I would like to verify these answers please..
What is the inductance of a series RL circuit in which R=1.0 K ohms if the current increases to 1/3 of it's final value in 30 Ms (M is the greek symbol Mu).
Is the answer 30 (none of these) or is it 74mH?? I calculated 74mH
i(t) = I (1-1/e^t/τ)
given i(t) = 1/3*I and t =30uS and τ =L/R
so,,substitutin these values
we get t/τ = 0.41
30*10^-6 / τ = 0.41
τ ˜ 74 μ sec
L/R ˜ 74usec
R = 1K
so,,L ˜74mH
The choices for answers are.
1.) 49
2.) none of these
3.) 99
4.)74
5.) 62
thankyou!
What is the inductance of a series RL circuit in which R=1.0 K ohms if the current increases to 1/3 of it's final value in 30 Ms (M is the greek symbol Mu).
Is the answer 30 (none of these) or is it 74mH?? I calculated 74mH
i(t) = I (1-1/e^t/τ)
given i(t) = 1/3*I and t =30uS and τ =L/R
so,,substitutin these values
we get t/τ = 0.41
30*10^-6 / τ = 0.41
τ ˜ 74 μ sec
L/R ˜ 74usec
R = 1K
so,,L ˜74mH
The choices for answers are.
1.) 49
2.) none of these
3.) 99
4.)74
5.) 62
thankyou!
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