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 Synchronous motor DC motor Universal motor Induction motor Synchronous motor DC motor Universal motor Induction 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 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° Voltage leads current by 45° Voltage and current are in phase with each other 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 Identify the INCORRECT statement with regards to synchronous motors It is a self-starting machine The armature winding is placed on the stator It is a constant speed motor The field winding is placed on the rotor It is a self-starting machine The armature winding is placed on the stator It is a constant speed motor The field winding is placed on the rotor 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
SSC JE Electrical 2019 with solution SET-1 In the full-wave rectifier circuit shown in the figure, the diodes that conduct when the positive half-wave of AC signal applied are D3, D4 D2, D3 D1, D2 D4, D1 D3, D4 D2, D3 D1, D2 D4, D1 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP During the positive half cycle of the supply, diodes D1 and D2 conduct are forward biased and conduct current while diodes D3 and D4 are reverse biased and they act as an open circuit, the current flows through the load.
SSC JE Electrical 2019 with solution SET-1 The function of condenser in a Thermal power plant is: Condense used steam into water Purify water Purify steam Condense water Condense used steam into water Purify water Purify steam Condense water ANSWER DOWNLOAD EXAMIANS APP
SSC JE Electrical 2019 with solution SET-1 The annual load factor of a generation station is equal to (No. of units actually supplied per year) ⁄ (Max. possible demand) (No. of units actually supplied per year) ⁄ (Max. possible demand × 8760) (No. of units actually supplied per year) ⁄ (Max. possible demand) (No. of units actually supplied per month) ⁄ (Max. possible demand × 8760) (No. of units actually supplied per year) ⁄ (Max. possible demand) (No. of units actually supplied per year) ⁄ (Max. possible demand × 8760) (No. of units actually supplied per year) ⁄ (Max. possible demand) (No. of units actually supplied per month) ⁄ (Max. possible demand × 8760) ANSWER DOWNLOAD EXAMIANS APP
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