engineering recuitment GATE IN Test Series 2023-24 Mock Test Communication Systems Optical Sources and Detector Photodiode
The figure shows a spot of light of uniform intensity 50 W/m2 and radius 5 mm incident at exact center of photo-detector comprising two identical photo-diodes D1 & D2. Each diode has sensitivity of 0.4 A/W and is operated in photo conductive mode. If the spot of light is displaced by \(2.5\sqrt 3 \;mm\) upwards, the resulting difference in photo currents generated by D1 & D2 is ______ μA.
Enter numerical value using the virtual keypad. Round off where necessary.