Signals and Systems - Engineering

Q1:

A voltage wave v = 10 + 20 sin ωt + 7.5 sin 3 ω(t) is applied to a series combination of two elements. The current is i = 5 sin (ωt + 20°) + 1.5 sin (3ωt + 10°). The elements are

A R and C

B R and L

C L and C

D both inductances

ANS:A - R and C

DC component is absent in current and current is leading the voltage. Hence R and C.