SSC JE Electrical 2019 with solution SET-1 Hunting occurs in a/an motor Synchronous DC shunt DC series Induction Synchronous DC shunt DC series Induction ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Sudden changes of load on synchronous motors may sometimes set up oscillations that are superimposed upon the normal rotation, resulting in periodic variations of a very low frequency in speed. This effect is known as hunting or phase-swinging.
SSC JE Electrical 2019 with solution SET-1 In an AC network, the load connected is (10 + j10). The phase relation between the voltage applied and the current through the load is: Voltage and current are in phase with each other Voltage lags current by 30° Voltage lags current by 45° Voltage leads current by 45° Voltage and current are in phase with each other Voltage lags current by 30° Voltage lags current by 45° Voltage leads current by 45° ANSWER EXPLANATION DOWNLOAD EXAMIANS APP L0ad impedance Z = R + jXz = 10 + 10jPhase angle θ= tan−1(IL/IR)θ= tan−1(10/10)tanθ = 1tanθ =45°
SSC JE Electrical 2019 with solution SET-1 Find the frequency of rotor induced EMF of a 3-phase, 440V, 50 Hz induction motor has a slip of 10% 2.5Hz 50Hz 25Hz 5Hz 2.5Hz 50Hz 25Hz 5Hz ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Given DataVoltage = 440 VFrequency = 50 HzSlip = 10% =0.1Now,Rotor frequency = slip × frequency= 0.1 × 50 = 5 Hz
SSC JE Electrical 2019 with solution SET-1 ______ Opposes the change in circuit voltage Resistance Capacitance Inductance Inductive reactance Resistance Capacitance Inductance Inductive reactance ANSWER DOWNLOAD EXAMIANS APP
SSC JE Electrical 2019 with solution SET-1 Extension of moving iron ammeter range can be done by using Shunt Capacitor Multiplier Inductor Shunt Capacitor Multiplier Inductor ANSWER DOWNLOAD EXAMIANS APP
SSC JE Electrical 2019 with solution SET-1 At f = _____R – L – C series circuit operates at unity power factor 1/2π√LC 1/RC 1 ⁄ LC 1 ⁄ RLC 1/2π√LC 1/RC 1 ⁄ LC 1 ⁄ RLC ANSWER DOWNLOAD EXAMIANS APP
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