SSC JE Electrical 2019 with solution SET-1 The power factor of an A.C. circuit is equal to R/XL R/Z R/XC Z/R R/XL R/Z R/XC Z/R ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In electrical engineering, the power factor of an AC electrical power system is defined as the ratio of the real power flowing to the load to the apparent power in the circuit ” R/Z”.
SSC JE Electrical 2019 with solution SET-1 Identify the INCORRECT statement with regards to synchronous motors It is a constant speed motor The armature winding is placed on the stator The field winding is placed on the rotor It is a self-starting machine It is a constant speed motor The armature winding is placed on the stator The field winding is placed on the rotor It is a self-starting machine 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 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 30° Voltage and current are in phase with each other Voltage lags current by 45° Voltage leads current by 45° Voltage lags current by 30° Voltage and current are in phase with each other Voltage lags current by 45° Voltage leads 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 Find the net capacitance of the combination in which ten capacitors of 10 μF are connected in parallel 1 μF 100 μF 0.1 μF 50 μF 1 μF 100 μF 0.1 μF 50 μF ANSWER EXPLANATION DOWNLOAD EXAMIANS APP When the capacitance is connected in series the total capacitance is given byCeq = C1 + C2 + C3………CNCeq = 10nCeq =10 × 10 = 100 μF
SSC JE Electrical 2019 with solution SET-1 In the circuit shown, if R = 0, then the phase angle between v(t) and i(t) is 60° 30° 90° 0° 60° 30° 90° 0° ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In the given circuit if R = 0 then the circuit becomes purely inductive. So the phase angle between v(t) and i(t) is 90°.
SSC JE Electrical 2019 with solution SET-1 Which of the following lamps employs a bimetallic strip? Mercury vapor lamp Fluorescent lamp Incandescent lamp Sodium vapor lamp Mercury vapor lamp Fluorescent lamp Incandescent lamp Sodium vapor lamp ANSWER DOWNLOAD EXAMIANS APP
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