SSC JE Electrical 2019 with solution SET-1 A synchronous motor runs at 600rpm, which of the following case is true? P= 12, f = 50 Hz P = 10, f = 60 Hz P = 8, f = 50 Hz P = 12, f = 60 Hz P= 12, f = 50 Hz P = 10, f = 60 Hz P = 8, f = 50 Hz P = 12, f = 60 Hz ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Synchronous speed NS = 120f/PWhenP = 12 & F = 60 then Ns = ?NS = 120f/P = (120 × 60)/12 = 600 RPM
SSC JE Electrical 2019 with solution SET-1 If N = linkage flux, then the linkage flux per unit current is defined as: Leakage coefficient Magnetomotive force Inductance Inductive reactance Leakage coefficient Magnetomotive force Inductance Inductive reactance ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The inductance L of this coil is defined as the flux linkage per unit current and its unit is Henry.L =Λ/IWhereΛ = Flux linkageI = current
SSC JE Electrical 2019 with solution SET-1 Which of the following is the function of the moderator in a nuclear reactor? Stopping chain reaction Controlling chain reaction To slow down the fast-moving electron Starting chain reaction Stopping chain reaction Controlling chain reaction To slow down the fast-moving electron Starting chain reaction ANSWER DOWNLOAD EXAMIANS APP
SSC JE Electrical 2019 with solution SET-1 At f = _____R – L – C series circuit operates at unity power factor 1/RC 1/2π√LC 1 ⁄ LC 1 ⁄ RLC 1/RC 1/2π√LC 1 ⁄ LC 1 ⁄ RLC ANSWER DOWNLOAD EXAMIANS APP
SSC JE Electrical 2019 with solution SET-1 Extension of moving iron ammeter range can be done by using Multiplier Capacitor Shunt Inductor Multiplier Capacitor Shunt Inductor ANSWER DOWNLOAD EXAMIANS APP
SSC JE Electrical 2019 with solution SET-1 Relate ‘Reluctance with the following: A-T/Weber Weber/m Weber/A A/m A-T/Weber Weber/m Weber/A A/m ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The reluctance of any part of a magnetic circuit may be defined as the ratio of the drop in magnetomotive force to the flux produced in that part of the circuit. It is measured in ampere-turns/Weber and is denoted by S.Reluctance = m.m.f ⁄ flux
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