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

dΦ − dA
dΦ ⁄ dA
Φ × A
dA ⁄ dΦ

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SSC JE Electrical 2019 with solution SET-1
 The output of the logic circuit given below represents the gate.

NAND
OR
AND
NOR

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