Home
Class 12
PHYSICS
The current in the forward bias is known...

The current in the forward bias is known to be more (-mA) than the current in the reverse bias `(-mu A)`. What is the reason, then, to operate the photodiode in reverse bias ?

Text Solution

Verified by Experts

Reverse bias current is very small so it can sense the small change produced by photo diode current much better.
Promotional Banner

Topper's Solved these Questions

  • SEMICONDUCTOR ELECTRONICS (MATERIAL, DEVICES AND SIMPLE CIRUITS )

    AAKASH INSTITUTE ENGLISH|Exercise EXERCISE|20 Videos

  • SEMICONDUCTOR ELECTRONICS (MATERIAL, DEVICES AND SIMPLE CIRUITS )

    AAKASH INSTITUTE ENGLISH|Exercise Assignment section -A (Objective Type Question)|43 Videos

  • SEMICONDUCTOR ELECTRONICS (MATERIAL, DEVICES AND SIMPLE CIRUITS )

    AAKASH INSTITUTE ENGLISH|Exercise Assignment SECTION - D (Assertion & reason type Question)|10 Videos

  • RAY OPTICS AND OPTICAL INSTRUMENTS

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT (SECTION - D)|16 Videos

  • SEMICONDUCTOR ELECTRONICS: MATERIALS, DEVICES AND SIMPLE CIRCUITS

    AAKASH INSTITUTE ENGLISH|Exercise Assignment (Section-D (Assertion and reason))|5 Videos

Similar Questions

Explore conceptually related problems

The current in the forward bias is known to be more (in mA ) than the current in the reverse bias (in mu A ). What is the reason then to operate the photodiodes in reverse bias?

In the figure, which of the diode is in reverse bias

In which case is the junction diode is not reverse bias-

Why photodiodes are required to operate in reverse bias explain.

Which of the following pn junction is not used in reverse bias?

With reference to a semi-conductor diode, what is meant by: Reverse bias

For a reverse bias P-N junction-

In a zener diode, break down occurs in reverse bias due to

When a p-n junction is reverse-biased,the current becomes almost constant at 25µA. current of when it is forward biased at 200 mV . a current of 75µA is obtained.Find the magnitude of diffusion current when the diode is (a)unbiased ,(b)reverse-biased at 200 mVand (c )forward-biased at 200mV.

A straight segment OC (of lengh L ) of a circuit carrying a current I is placed along the x-axis. Two infinitely long straight wire A and B each extending from z=-ooto+oo are fixed at y=-a and y=+a respectively as show in the figure. If the wires A and B each carry a current I into the plane of the paper, obtain the expression for the force acting on the segment OC . What will be the force on OC if the current in the wire B is reversed?

AAKASH INSTITUTE ENGLISH-SEMICONDUCTOR ELECTRONICS (MATERIAL, DEVICES AND SIMPLE CIRUITS )-TRY YOUR SELF
  1. If in p-n junction diode a sinusoidal input signal is applied as shown...

    Text Solution

    |

  2. In a reverse biased diode, when the applied voltage changes by 1V, the...

    Text Solution

    |

  3. Potential drop across forward junction p-n diode is 0.7 V. If a batter...

    Text Solution

    |

  4. Potential barrier developed in a junction diode opposes the flow of

    Text Solution

    |

  5. A forward biased diode is

    Text Solution

    |

  6. Application of forward bias to p-n junction

    Text Solution

    |

  7. In a p-n junction having depletion layer of thickness 10^(-6) m the po...

    Text Solution

    |

  8. Pickout the incorrect statement regarding reverse saturation current i...

    Text Solution

    |

  9. The diode used in the circuit shown in the figure has a constant volta...

    Text Solution

    |

  10. With an ac input from 50 Hz power line, the ripple frequency is

    Text Solution

    |

  11. Freuency of given AC signal is 50 Hz. When it connected to a half - wa...

    Text Solution

    |

  12. What is the output form of full-wave rectifier ?

    Text Solution

    |

  13. In a Zener regulated power supply a Zener diode with V(Z) = 6.0 V is u...

    Text Solution

    |

  14. The current in the forward bias is known to be more (-mA) than the cur...

    Text Solution

    |

  15. Why are Si and GaAs are preferred materials for solar cells?

    Text Solution

    |

  16. For a CE transistor amplifier , the audio signal voltage across the co...

    Text Solution

    |

  17. In the figure of transistor as a switch, the V(BB) supply can be varie...

    Text Solution

    |

  18. Show the output waveform of OR gate for the following input waveforms ...

    Text Solution

    |

  19. Sketch the output waveform obtained from AND gate for the following in...

    Text Solution

    |

  20. Sketch the output waveform Y from a NAND gate having following inputs ...

    Text Solution

    |