1.

_The time constant of an inductance coil is 2.0x 10^-3s.When a 90 Ω resistance is joined in series, then thetime constant becomes 0.5x 10^-3 s. The inductance andresistance of the coil are

Answer»

Time constant = L/R

Given time constant = 2x10^-3 and R = 90 ohms

Therefore L = 2x90 x 10^-3 = 180 x 10^-3

When T = 0.5 x 10^-3, R = 180x10^-3 /0.5 x 10^-3 = 360 ohms

Time constant = L/R

Given time constant = 2x10^-3 and R = 90 ohms

Therefore L = 2x90 x 10^-3 = 180 x 10^-3

When T = 0.5 x 10^-3, R = 180x10^-3 /0.5 x 10^-3 = 360 ohms



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