SSC JE Electrical 2019 with solution SET-1

SSC JE Electrical 2019 with solution SET-1
Which of the following losses is together called iron losses?

Eddy current loss and frictional loss

Hysteresis loss and frictional loss

Hysteresis loss and copper loss

Eddy current loss and hysteresis loss

Eddy current loss and frictional loss

Hysteresis loss and frictional loss

Hysteresis loss and copper loss

Eddy current loss and hysteresis loss

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SSC JE Electrical 2019 with solution SET-1
A magnetic circuit is applied with a current that changes at a rate of 5 A/sec. The circuit has an inductance of 2H, then the self-induced EMF is

−10 V

−2.5 V

−4 V

0.4 V

−10 V

−2.5 V

−4 V

0.4 V

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SSC JE Electrical 2019 with solution SET-1
The function of condenser in a Thermal power plant is:

Condense used steam into water

Purify steam

Purify water

Condense water

Condense used steam into water

Purify steam

Purify water

Condense water

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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

4

1

2

0.5

4

1

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SSC JE Electrical 2019 with solution SET-1
Three lamps are connected in series across a 120V supply and take a current of 1.5A. If the resistance of two of the lamps is 30Ω, what is the resistance of the third lamp?

30Ω

40Ω

20Ω

10Ω

30Ω

40Ω

20Ω

10Ω

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SSC JE Electrical 2019 with solution SET-1
In the two wattmeter method, the readings of the two wattmeters are 500W, 500W respectively. The load power factor in a balanced 3-phase 3-wire circuit is:

1

0.5

0.8

0.9

1

0.5

0.8

0.9

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