Home
Class 12
PHYSICS
The on/off time or switching time of lig...

The on/off time or switching time of light emitting diodes is the order of

A

a micro second

B

a nano second

C

a milli second

D

one second

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • ROTATIONAL MOTION

    NIKITA PUBLICATION|Exercise MULTIPLE CHOICE QUESTIONS|405 Videos

  • STATIONARY WAVES

    NIKITA PUBLICATION|Exercise MCQs|396 Videos

Similar Questions

Explore conceptually related problems

A light emitting diode is

A light emitting diode is shown as

What is a light - emitting diode?

The light emitting diode (LED),

Light-emitting diode (LED) converts

The schematic symbol of light emitting diode (LED) is

Mention the important considerations required while fabricating a p-n junction diode to be used as light emitting diode (LED). What should be the order of the band gap of an LED if it is required to emit light in the visible region.

A fiber of length 10 cm is illuminated with light from an light emitting diode (LED) which is turned on and off repeatedely for equal amount of time. The speed of the pulse of light are 2.00xx10^(8)m//s and 2.1xx10^(8)m//s in fiber. Maximum frequency of LED os that pulse arrive without overlapping is 60X(KHz) . Calculate X .

NIKITA PUBLICATION-SEMICONDUCTORS-MCQS
  1. A light emitting diode is shown as

    Text Solution

    |

  2. A light emitting diode is

    Text Solution

    |

  3. The on/off time or switching time of light emitting diodes is the orde...

    Text Solution

    |

  4. A solar cell is p-n junction operating in

    Text Solution

    |

  5. Barrier potential of Ga-As-P LED is

    Text Solution

    |

  6. V-I characteristics of LED is similar to forward bias characteristics ...

    Text Solution

    |

  7. Which of the following is advantage of LED ?

    Text Solution

    |

  8. Which of the following material is used to produce infrared LED's ?

    Text Solution

    |

  9. The emitter of transistor is doped the heaviest because it

    Text Solution

    |

  10. A transistor is preferable to a triode valve when used in amplifier be...

    Text Solution

    |

  11. The current gain of a transistor is defined as

    Text Solution

    |

  12. Transistors may not replace vacuum tubes in all uses because

    Text Solution

    |

  13. In n-p-n transistor, the p-type crystal acts as

    Text Solution

    |

  14. A transistor is used in the common emitter mode as an amplifier . Then

    Text Solution

    |

  15. Which of the following element is used in making transistors ?

    Text Solution

    |

  16. In transistor symbols, the arrows shows the direction of-

    Text Solution

    |

  17. In an n-p-n transistor, the emitter current is always less than the em...

    Text Solution

    |

  18. In case of an n-p-n transistor, the collector current is always less t...

    Text Solution

    |

  19. In a transistor circuit, the emitter current is 50 mA and base current...

    Text Solution

    |

  20. In p-n-p transistor , the p type crystal acts as

    Text Solution

    |