Engineering Quantitative Aptitude English Reasoning General Knowledge Coding Others

Quiz: EDC- Basics OPTO electronics

To View Tricks: Login Required

Number of Questions: 20

Question: 16 -

Photo-multipliers are based on the principles of

Options:

  1. Reverse current is small as compared to photo current

  2. Photo voltaic effect

  3. Reverse current is large as compared to photo current

  4. Piezo-electric effect

    5. Answer:

    Reverse current is small as compared to photo current
    Solution not available.

Question: 17 -

A step index fiber has a core diameter of 60 μm . Core refractive index of 1.6 and numerical aperture of 0.21 , the number of modes that the fiber can propagate at a wavelength of 1 μm

Options:

  1. 40 modes

  2. 493 modes

  3. 1000 modes

  4. 783 modes

    5. Answer:

    783 modes
    Solution not available.

Question: 18 -

A step index fiber has a core diameter of 60 μm . Core refractive index of 1.6 and numerical aperture of 0.21 , the acceptance angle is

Options:

  1. 12.12 °

  2. 55.6 °

  3. 24.68 °

  4. 46.28 °

    5. Answer:

    12.12 °
    Solution not available.

Question: 19 -

Ion implementation is alternate choice for

Options:

  1. Chemical diffusion

  2. High heat temperature diffusion

  3. Low heat temperature diffusion

  4. All of the above

    5. Answer:

    High heat temperature diffusion
    Solution not available.

Question: 20 -

What is the reponsitivity of a detector having a quantum efficiency of 15% at 0.8 μm

Options:

  1. 4.8 mA/W

  2. 9.6 mA/W

  3. 2.2 mA/W

  4. 3.6 mA/W

    5. Answer:

    9.6 mA/W
    Solution not available.