SSC JE Electrical 2019 with solution SET-1 An electric motor in which both the rotor and stator fields rotate with the same speed is called Induction motor Universal motor Synchronous motor DC motor Induction motor Universal motor Synchronous motor DC motor ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In the synchronous motor, the stator and rotor rotate at the same speed.
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 leads current by 45° Voltage and current are in phase with each other Voltage lags current by 45° Voltage lags current by 30° Voltage leads current by 45° Voltage and current are in phase with each other Voltage lags current by 45° Voltage lags current by 30° 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 If N = linkage flux, then the linkage flux per unit current is defined as: Inductive reactance Leakage coefficient Magnetomotive force Inductance Inductive reactance Leakage coefficient Magnetomotive force Inductance 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 Prevention of interference with neighboring telephone lines can be done by: Reducing corona Reducing skin effect Transposing transmission lines Using bundled conductors Reducing corona Reducing skin effect Transposing transmission lines Using bundled conductors ANSWER DOWNLOAD EXAMIANS APP
SSC JE Electrical 2019 with solution SET-1 The function of condenser in a Thermal power plant is: Purify water Condense used steam into water Condense water Purify steam Purify water Condense used steam into water Condense water Purify steam ANSWER DOWNLOAD EXAMIANS APP
SSC JE Electrical 2019 with solution SET-1 What would the total loss of the 2kVA transformer corresponding to maximum efficiency be, provided the transformer has the iron of 150 W and full-load copper loss of 250W? 400 W 500 W 100 W 300 W 400 W 500 W 100 W 300 W ANSWER EXPLANATION DOWNLOAD EXAMIANS APP When variable loss becomes equal to the constant loss, efficiency is maximum.Losses = Pi + PcSince copper loss is a variable loss thereforeLosses = Pi + Pi = 2piThus at a maximum efficiency of this transformer total loss= 150 x 2 = 300 W
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