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:

0.9
1
0.5
0.8

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SSC JE Electrical 2019 with solution SET-1
 For a three-layer stranded wire, the number of strands in the first, second, and third layer respectively are:

1, 5 and 10
1, 6 and 12
1, 7 and 14
1, 4 and 8

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SSC JE Electrical 2019 with solution SET-1
 What would the total loss of the 2kVA transformer corresponding to maximum efficiency be, provided the transformer has the iron of 150 W and full-load copper loss of 250W?

400 W
500 W
100 W
300 W

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SSC JE Electrical 2019 with solution SET-1
 What is the reason behind using a centrifugal switch in a single-phase induction motor?

To out in the capacitor during running conditions
To protect the motor from overloading
To cut-off the starting winding at an appropriate instant
To improve the starting performance of the motor

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SSC JE Electrical 2019 with solution SET-1
 The laws involved in the expression e  = −dφ/dt are

Coulomb’s and Ampere’s laws
Faraday’s and Ampere’s laws
Faraday’s and Lenz’s laws
Coulomb’s and Faraday’s laws

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