For the circuit in Fig. 7.100,v = 90e−50t Vandi = 30e−50t A, t > 0(a) Find L and R.(b)...

For the circuit in Fig. 7.100,

v = 90e−50t V

and

i = 30e−50t A, t > 0

(a) Find L and R.

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(b) Determine the time constant.

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(c) Calculate the initial energy in the inductor.

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(d) What fraction of the initial energy is dissipated in 10 ms?

Figure 7.100