ElectroMagnetic InductionMedium
Question
The time constant of an inductance coil is 2.0 × 10-3 s. When a 90Ω resistance is joined in series, the time constant becomes 0.5 × 10-3 s. The inductance and resistance of the coil are : -
Options
A.30 mH ; 30Ω
B.30 mH ; 60Ω
C.60 mH ; 30Ω
D.60 mH ; 60Ω
Solution
= 2 × 10-3 & 
= 0.5 × 10-3⇒
= 4 ⇒ R1 = 30Ω, L = 60mHCreate a free account to view solution
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