Question

A series RL circuit is excited by a voltage v(t) = Vm sin (ωt + Φ). The transient current will be zero if

a.

Φ = 0

b.

ω = 0

c.

Φ = tan¯¹ (ωL/R)

d.

ω - tan¯¹ (ωL/R) = p/2

Answer: (c).Φ = tan¯¹ (ωL/R)

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Q. A series RL circuit is excited by a voltage v(t) = Vm sin (ωt + Φ). The transient current will be zero if

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