SSC JE Electrical 2018 with solution SET-1
The main drawback of resistance welding is

High initial as well as High maintenance cost
None of these
Only similar metals can be welded
Difficult shapes and sections cannot be welded

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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

450 W
350 W
300 W
800 W

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SSC JE Electrical 2018 with solution SET-1
 Calculate the phase angle between the voltage and current phasor of a series RL circuit having the resistance of 65 Ohms and Inductive reactance of 37.53 ohms when supplied by a frequency of 60 Hz

45°
15°
60°
30°

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