Rajkamal Sir (Engineers Platform) 📚📚

5. The unit of plain angle is [SSC JE EE 2021]

4. Which of the following will need the highest level of illumination? [SSC JE EE 2021]

3. The illumination level in houses is in the range [SSC JE EE 2018]

2. The lens of the eyes focuses an image on the [SSC JE EE 2018]

1. A photocell is illuminated by a small bright source placed 1 m away. When the same source of light is placed two meters away, the electrons emitted by the photocathode. [SSC JE EE 2021]

4. If d∅ is the luminous flux incident normally on an area dA, then Illuminance is given as: [SSC JE EE 2021]

3. For indoor lighting the ratio of space: height is………….[SSC JE EE 2021]

2. Lamp efficiency is measured in………………..[SSC JE EE 2021]

1. The candle power of a lamp placed normal to a working plane is 60 CP. Find the distance if the illumination is 15 lux. [SSC JE EE 2021]