engineering recuitment UPPCL Technician Electrician 2022 Mock Test Electrician and Wireman Electrical Networks Alternating Current
Four supply systems are given below. Find the correct combination of balanced and unbalanced systems.
(a) νAB = 400 sinωt; νBC = 400 sin(ωt - 120°); νCA = 410 sin(ωt - 240°)
(b) νAB = 400 sinωt; νBC = 400 sin (ωt - 125°); νCA = 400 sin(ωt + 120°)
(c) νAB = 400 sinωt; νBC = 400 sin(ωt - 120°); νCA = 400 sin(ωt + 120°)
(d) νAB = 400 sinωt; νBC = 400 sin(ωt - 120°); νCA = 400 sin(ωt - 240°)
1
(c) is balanced and (a) is balanced
2
(b) is unbalanced and (a) is balanced
3
(b) is unbalanced and (d) is unbalanced
4
(d) is balanced and (c) is balanced