CUET and UG exam BITSAT Mock Test Series 2025 Physics Semiconductors

If the distance of 100 watt lamp is increased from a photocell, the saturation current i in the photocell varies with the distance d as

1
i α d2
2
i α d
3
i α \(\frac{1}{d}\)
4
i α \(\frac{1}{d^2}\)
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