In optic fiber transmission system _____________ are used regenerate the dim light signal?

Related Mcqs:

1. Errors in the transmission of power through optic fiber can be minimized by using a______________?

   A. Multimode index fiber
   B. Graded index fiber
   C. Single mode step index fiber
   D. Copper wire

2. In optic fiber transmission the repeater are separated through a distance of __________ km in newer system?

   A. 300km
   B. 200km
   C. 100km
   D. 20km

3. The light used in optical fiber transmission is________?

   A. Dichromatic
   B. Monochromatic
   C. Pentachromatic
   D. None of these

   Submitted by: Raza Baloch

4. In a photoelectric effect monochromatic light is incident on a metal surface. If the incident light of twice the intensity but of same wavelength the kinetic energy of the emitted electron_______________?

   A. Becomes double
   B. Remains same
   C. Becomes half
   D. First increases then decrease because of the curvilinear graph

5. An inductive coil has a resistance of 100Ω. When an AC signal of frequency 1000Hz is fed to the coil the applied voltage leads the current by 45Ω. What is the inductance of the coil ?

   A. 10mH
   B. 12mH
   C. 16mH
   D. 20mH

6. An OP-AMP comparator is a circuit that compares the signal voltage on one of its inputs with a ______________?

   A. Non-inverting voltage at output
   B. Reference voltage on the other
   C. Virtual input
   D. Output

7. Medium which sends signal from source to destination is known as ________ ?

   A. Transmitter
   B. Transmission channel
   C. Receiver
   D. Hardware

   Submitted by: Rashid Mehmood

8. If a convex lens of large aperture fails to converge the light rays incident on it to a single point, it is said to suffer from______________?

   A. chromatic aberration
   B. spherical aberration
   C. both spherical and chromatic
   D. distortion

9. A point where the incident parallel rays of light converge or appear to diverge after passing through a lens is called______________?

   A. center of curvature
   B. focus
   C. optical center
   D. aperture

10. Michelson calculated the speed of light using the instruments______________?

    A. spectrometer
    B. galvanometer
    C. interferometer
    D. none of these