Rajkamal Sir (Engineers Platform) 📚📚

4. Which of the following will need lowest level of illumination? [SSC JE EE 2018]

3. Radiant efficiency of a luminous source depends on on………..[SSC JE EE 2021]

2. Lux is unit of which physical quantity? [SSC JE EE 2018]

1. A lamp having mean spherical candle power of 800 is suspended at a height of 10 m. Calculate the illumination just below the lamp. [SSC JE EE 2014]

5. The space to height ratio in illumination lies between [SSC JE EE 2018]

4. Lux is unit of which physical quantity? [SSC JE EE 2018]

3. Radiant efficiency of a luminous source depends on on………..[SSC JE EE 2021]

2. Which of the following will need lowest level of illumination? [SSC JE EE 2018]

1. A lamp having mean spherical candle power of 800 is suspended at a height of 10 m. Calculate the illumination just below the lamp. [SSC JE EE 2014]

5. In the electric discharge lamps, the light is produced by:

4. Halogen lamps have the advantage(s) of: [SSC JE EE 2021]

3. The luminous efficiency of a sodium vapour lamp is: [SSC JE EE 2018]

2. The most important factor with respect to lighting quality is [SSC JE EE 2018]

1. Lumen/watt is the unit of………….