SSC JE Electrical 2018 with solution SET-1
 A 40KVA transformer has a core loss of 450 W and total loss of 800 W. Find the copper loss for Maximum efficiency

800 W
450 W
350 W
300 W

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SSC JE Electrical 2018 with solution SET-1
The motor used on a small lathe is usually

Single-phase capacitor run Motor
3-Phase Synchronous Motor
D.C shunt Motor
Universal Motor

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SSC JE Electrical 2018 with solution SET-1
 Which one of the following statement is NOT true about PMMC type instruments?

PMMC type Instruments have uniformly divided scale
The cost of PMMC instruments is high
These instruments are suitable for both AC and DC currents
Stray magnetic errors are small in these types of instruments

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SSC JE Electrical 2018 with solution SET-1
 A 3-phase star connected system is supplied by a line voltage of 440 V. The value of the current is 50 A. What is the power (in kW) consumed by the system, if the current lags the voltage by 45 degrees?

26.94
47
8.95
24

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SSC JE Electrical 2018 with solution SET-1
 On which of the following parameters the eddy current loss occurring in a material does not depend?

The frequency of variation of flux
The volume of the material
Magnetic flux Density
Susceptibility

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