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 = 12, f = 60 Hz P = 10, f = 60 Hz P = 8, f = 50 Hz P= 12, f = 50 Hz P = 12, f = 60 Hz P = 10, f = 60 Hz P = 8, f = 50 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 ______ Opposes the change in circuit voltage Capacitance Resistance Inductance Inductive reactance Capacitance Resistance Inductance Inductive reactance 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 ⁄ LC 1/RC 1 ⁄ RLC 1/2π√LC 1 ⁄ LC 1/RC 1 ⁄ RLC 1/2π√LC ANSWER DOWNLOAD EXAMIANS APP
SSC JE Electrical 2019 with solution SET-1 Extension of moving iron ammeter range can be done by using Capacitor Inductor Shunt Multiplier Capacitor Inductor Shunt Multiplier ANSWER DOWNLOAD EXAMIANS APP
SSC JE Electrical 2019 with solution SET-1 The Thevenin’s resistance as seen through the terminals A and B is: 4 Ω 5 Ω 6 Ω 8 Ω 4 Ω 5 Ω 6 Ω 8 Ω ANSWER DOWNLOAD EXAMIANS APP
SSC JE Electrical 2019 with solution SET-1 Identify the INCORRECT statement with regards to synchronous motors It is a self-starting machine The field winding is placed on the rotor The armature winding is placed on the stator It is a constant speed motor It is a self-starting machine The field winding is placed on the rotor The armature winding is placed on the stator It is a constant speed motor ANSWER EXPLANATION DOWNLOAD EXAMIANS APP A synchronous motor is not a self-starting motor. You can check out this article why synchronous motor is not self starting
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