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SSE JE Electrical Engineering 24-March-2021 Shift 1 Paper

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Question : 129

Total: 200

A transformer on no-load has a core-loss of 50 W, draws a current of 2 A and has an induced EMF of 230 V. Determine the no-load power factor and core-loss current.

Power factor = 0.208 lagging, core-loss current = 0.416 A
Power factor = 0.108 lagging, core-loss current = 0.216 A
Power factor = 0.108 lagging, core-loss current =2‌sin(cos−10.108)‌A
Power factor = 0.208 lagging, core-loss current =2‌sin(cos−10.208)‌A

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