SSC JE Electrical 2019 with solution SET-1
 If dΦ is the luminous flux incident normally on an area dA, then Illuminance is given as

Φ × A
dΦ ⁄ dA
dΦ − dA
dA ⁄ dΦ

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SSC JE Electrical 2019 with solution SET-1
 Which of the following lamps has the shortest/less life span in working hours?

Fluorescent lamp
Incandescent lamp
Sodium vapor lamp
Mercury vapor lamp

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SSC JE Electrical 2019 with solution SET-1
 Is it possible to have current in a transmission line, under no-load conditions?

Yes, because of skin effect
Yes, because of the capacitance effect
No, because of the proximity effect
Yes, because of the corona effect

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