SSC JE Electrical 2019 with solution SET-1 Two coupled coils with L1 = L2 = 0.5H have a coupling coefficient of K = 0.75. The turn ratio N1 ⁄ N2 = ? 2 0.5 1 4 2 0.5 1 4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The self-inductance is given asL = μN2A/IL ∝ N2whereN is the number of turns of the solenoidA is the area of each turn of the coill is the length of the solenoidand μ is the permeability constantL1/L2 = N21/N220.5/0.5 = N21/N22N1/N2 = 1
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 30° Voltage lags current by 45° Voltage leads current by 45° Voltage and current are in phase with each other Voltage lags current by 30° Voltage lags current by 45° 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 When the supply to the excitation fails, the synchronous generator acts like a/an Induction generator Induction motor Synchronous motor Synchronous generator Induction generator Induction motor Synchronous motor Synchronous generator ANSWER DOWNLOAD EXAMIANS APP
SSC JE Electrical 2019 with solution SET-1 In the speed-time curve of a train, speed in and time are plotted km/s; hour km/s; sec km/h; hour km/h; sec km/s; hour km/s; sec km/h; hour km/h; sec ANSWER DOWNLOAD EXAMIANS APP
SSC JE Electrical 2019 with solution SET-1 The direction of the arrow represents the direction of when the diode is forward biased P-N Junction P-type material Conventional current flow N-type material P-N Junction P-type material Conventional current flow N-type material ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The direction of the arrow represents the direction of the conventional current flow when the diode is forward biased.
SSC JE Electrical 2019 with solution SET-1 An electric heater is connected across 230V and it draws a current of 2A. Then the resistance offered by the heater is? 115 ohm 29 ohm 290 ohm 11.5 ohm 115 ohm 29 ohm 290 ohm 11.5 ohm ANSWER EXPLANATION DOWNLOAD EXAMIANS APP GivenVoltage V = 230 VCurrent I = 2 AResistance R = V/IR = 230/2 = 115 Ω
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