SSC JE Electrical 2018 with solution SET-1
A delta connected 3-phase circuit has three resistance of 36 Ohms in each phase. What is the value of per phase resistance (in ohms) of the equivalent star connected circuit?
Current through the 10Ω resistance I1 = V/R = 20/10 = 2A I1 = 2A Now current through the 20Ω resistance I2 = V − (-10)/R = (20 + 10)/20 = 1.5 A I2 = 1.5 A
Speed in the rotating disk ξ = ½ ω.B.R2 ω = angular velocity = 2πN = 2 × 3.14 × 60 = 376.8 rad/sec B = Magnetic Field = 3 T Radius R = 10 cm = 0.1 m Applying the above formula ξ = ½ 376.8 × 3 × 0.12 ξ = 5.65 V
EXAMIANS
