SSC JE Electrical 2019 with solution SET-1 The average value of a sinusoidal wave is: 0.637 × maximum value 0.5 × maximum value √2 × maximum value 2 × maximum value 0.637 × maximum value 0.5 × maximum value √2 × maximum value 2 × maximum value ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The average value of the sine wave over one complete cycle is actually zero. Hence, for a sine wave, the average value is defined over half the period. The average value expressed in terms of peak value is given byAverage value = 0.637 × peak value
SSC JE Electrical 2019 with solution SET-1 A synchronous motor runs at 600rpm, which of the following case is true? 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 P= 12, f = 50 Hz P = 12, f = 60 Hz P = 10, f = 60 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 The ratio of average energy demand to maximum demand during a specific period in Form factor Utilization factor Power factor Load factor Form factor Utilization factor Power factor Load factor ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The ratio of average energy demand to maximum demand during a specific period is called the load factor.Load Factor = Average Load/Maximum Demand
SSC JE Electrical 2019 with solution SET-1 At f = _____R – L – C series circuit operates at unity power factor 1 ⁄ RLC 1/2π√LC 1 ⁄ LC 1/RC 1 ⁄ RLC 1/2π√LC 1 ⁄ LC 1/RC ANSWER DOWNLOAD EXAMIANS APP
SSC JE Electrical 2019 with solution SET-1 _____ power plant is the plant which uses a non-conventional source of energy Thermal Wind Nuclear Hydroelectric Thermal Wind Nuclear Hydroelectric ANSWER DOWNLOAD EXAMIANS APP
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 DC motor Synchronous motor Induction motor Universal motor DC motor Synchronous motor Induction motor Universal motor ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In the synchronous motor, the stator and rotor rotate at the same speed.
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