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A sinusoidal current is zero at t = - 625 s and increasing at a rate of 8000 A/s. The maximum amplitude of the current is 20 A.
a) What is the frequency of i in radians per second?
b) What is the expression for i? (give answer where t is miliseconds and the phase angle is in radians)
v(t)=20te^( -40t ) and i(t)=50te^( -40t ) for t>=0 both v and i are zeros for i
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