SSC JE Electrical 2019 with solution SET-1 At f = _____R – L – C series circuit operates at unity power factor 1/RC 1 ⁄ LC 1/2π√LC 1 ⁄ RLC 1/RC 1 ⁄ LC 1/2π√LC 1 ⁄ RLC ANSWER DOWNLOAD EXAMIANS APP
SSC JE Electrical 2019 with solution SET-1 Which of the following lamps employs a bimetallic strip? Fluorescent lamp Mercury vapor lamp Sodium vapor lamp Incandescent lamp Fluorescent lamp Mercury vapor lamp Sodium vapor lamp Incandescent lamp 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 8 Ω 6 Ω 5 Ω 4 Ω 8 Ω 6 Ω 5 Ω ANSWER DOWNLOAD EXAMIANS APP
SSC JE Electrical 2019 with solution SET-1 Two coupled coils with L1 = L2 = 0.5H have a coupling coefficient of K = 0.75. The turn ratio N1 ⁄ N2 = ? 4 2 0.5 1 4 2 0.5 1 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The self-inductance is given asL = μN2A/IL ∝ N2whereN is the number of turns of the solenoidA is the area of each turn of the coill is the length of the solenoidand μ is the permeability constantL1/L2 = N21/N220.5/0.5 = N21/N22N1/N2 = 1
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% 50Hz 25Hz 2.5Hz 5Hz 50Hz 25Hz 2.5Hz 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 With the current direction marked in the circuit shown, the net voltage applied is V1 −(V2 − V1) V2 (V2 − V1) V1 −(V2 − V1) V2 (V2 − V1) ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Net voltage = −V2 + V1Net voltage = −(V2 − V1)
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