SSC JE Electrical 2018 with solution SET-1 The maximum speed variation in a synchronous motor is 10% 2% 5% Zero 10% 2% 5% Zero ANSWER EXPLANATION DOWNLOAD EXAMIANS APP A synchronous motor is a constant speed motor, therefore, the variation of speed is zero.
SSC JE Electrical 2018 with solution SET-1 Determine the magnitude of EMF (in V) induced between the axis of rotation and the rim of the disc, when the disc of radius 10 cm rotates with an angular velocity of 60 revolutions per second and placed in the magnetic field of 3 T acting parallel to the rotation of the disc 6.67 4.64 6.69 5.65 6.67 4.64 6.69 5.65 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Speed in the rotating diskξ = ½ ω.B.R2ω = angular velocity = 2πN = 2 × 3.14 × 60 = 376.8 rad/secB = Magnetic Field = 3 TRadius R = 10 cm = 0.1 mApplying the above formulaξ = ½ 376.8 × 3 × 0.12ξ = 5.65 V
SSC JE Electrical 2018 with solution SET-1 The process of adding, impurities to a semiconductor is known as___ Polling Instrusion Doping Pugging Polling Instrusion Doping Pugging ANSWER DOWNLOAD EXAMIANS APP
SSC JE Electrical 2018 with solution SET-1 The air preheater in a thermal power plant is called as Safety Device Starting Device Efficiency increasing equipment Very essential Device Safety Device Starting Device Efficiency increasing equipment Very essential Device ANSWER DOWNLOAD EXAMIANS APP
SSC JE Electrical 2018 with solution SET-1 The output Resistance (in kΩ) of the common base transistor is of the order of 100 None of these 50 1 100 None of these 50 1 ANSWER DOWNLOAD EXAMIANS APP
SSC JE Electrical 2018 with solution SET-1 In a synchronous motor which loss varies with the load? Copper Loss Bearing friction Loss Windage loss Core Loss Copper Loss Bearing friction Loss Windage loss Core Loss ANSWER DOWNLOAD EXAMIANS APP
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