SSC JE Electrical 2019 with solution SET-1 The Thevenin’s resistance as seen through the terminals A and B is: 4 Ω 8 Ω 6 Ω 5 Ω 4 Ω 8 Ω 6 Ω 5 Ω ANSWER DOWNLOAD EXAMIANS APP
SSC JE Electrical 2019 with solution SET-1 Find the mutual inductance between two ideally coupled coils of 2H and 8H 16 H 4 H 2 H 8 H 16 H 4 H 2 H 8 H ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Mutual inductance between the two coils is K = √L1.L2K = √2 × 8k = √16k = 4 H
SSC JE Electrical 2019 with solution SET-1 A synchronous motor runs at 600rpm, which of the following case is true? 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 P = 8, f = 50 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 Hysteresis loss is NOT a function of Frequency The volume of a material Steinmetz co-efficient of material Ambient temperature Frequency The volume of a material Steinmetz co-efficient of material Ambient temperature ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Hysteresis Loss = Kh × BM1.67 × f × v wattswhereKh = Hysteresis constant depends upon the materialBm = Maximum flux densityf = frequencyv = Volume of the coreHence the hysteresis loss does not depend upon the ambient temperature.
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 90° 0° 30° 60° 90° 0° 30° 60° 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 If an alternator is operating at unity power factor, then its terminal voltage is Less than the induced EMF, with positive voltage regulation Equal to the induced EMF, with zero voltage regulation Greater than the induced EMF, with negative voltage regulation Less than the induced EMF, with negative regulation Less than the induced EMF, with positive voltage regulation Equal to the induced EMF, with zero voltage regulation Greater than the induced EMF, with negative voltage regulation Less than the induced EMF, with negative regulation ANSWER DOWNLOAD EXAMIANS APP
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