SSC JE Electrical 2018 with solution SET-1 LED lamp have a general life expectancy of 15000 hrs 50000 hrs 5000 hrs 1000 hrs 15000 hrs 50000 hrs 5000 hrs 1000 hrs ANSWER DOWNLOAD EXAMIANS APP
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 5.65 6.67 4.64 6.69 5.65 6.67 4.64 6.69 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 In a synchronous motor which loss varies with the load? Core Loss Copper Loss Windage loss Bearing friction Loss Core Loss Copper Loss Windage loss Bearing friction Loss ANSWER DOWNLOAD EXAMIANS APP
SSC JE Electrical 2018 with solution SET-1 Power consumed by a balanced star connected 3-phase load is measured using the two-wattmeter method. The phase voltage and phase current in the load is 220V and 10 A respectively. What will be the difference in reading (in W) of the two wattmeters, if the power factor of the system is 0.8 Lagging? 3048.4 2861.2 2286.3 3810.5 3048.4 2861.2 2286.3 3810.5 ANSWER DOWNLOAD EXAMIANS APP
SSC JE Electrical 2018 with solution SET-1 The relative permeability of the diamagnetic material is Greater than 100 Greater than 10 Greater than 1 Less than 1 Greater than 100 Greater than 10 Greater than 1 Less than 1 ANSWER DOWNLOAD EXAMIANS APP
SSC JE Electrical 2018 with solution SET-1 In a synchronous motor running with the fixed excitation, when the load is increased two times, its torque angle becomes approximately No Change Four Times Twice Half No Change Four Times Twice Half ANSWER DOWNLOAD EXAMIANS APP
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