회로이론전기산업기사 · 2011년03월20일 · 78/100
78.일 때 e1+e2의 실효값은 몇[V]인가?
1
50
2
70
3
10√7
4
10√37정답
해설
E1=30∠0º E2=40√2cos(wt-π/6)=40√2sin(wt-π/6+π/2)=40√2sin(wt-π/3) =40∠60º E1+E2=30+40cos60º+j40sin60º=50+j34.64=√50^2+34.64^2=√3700=10√37
E1=30∠0º E2=40√2cos(wt-π/6)=40√2sin(wt-π/6+π/2)=40√2sin(wt-π/3) =40∠60º E1+E2=30+40cos60º+j40sin60º=50+j34.64=√50^2+34.64^2=√3700=10√37