Home
Class 12
PHYSICS
What is photo electric cells? Give its t...

What is photo electric cells? Give its two applications.

Text Solution

Verified by Experts

Photoelectric cell. It is a device which can convert light energy into electrical energy.. It is also known as an electric eye.
Applications :
1. It is used in automatic fire alarms.
2. It is used in burglar alarm.
3. These are used to analyse the intensities and temperature of sun, stars and other heavenly bodies.
Promotional Banner

Topper's Solved these Questions

  • PARTICLE NATURE OF RADIATION

    BETTER CHOICE PUBLICATION|Exercise SHORT ANSWER TYPE QUESTIONS MOST EXPECTED QUESTIONS)|3 Videos

  • PARTICLE NATURE OF RADIATION

    BETTER CHOICE PUBLICATION|Exercise NUMERICAL PROBLEMS |32 Videos

  • PARTICLE NATURE OF RADIATION

    BETTER CHOICE PUBLICATION|Exercise VERY SHORT ANSWER QUESTIONS (MOST EXPECTED QUESTIONS)|6 Videos

  • OPTICAL INSTRUMENTS

    BETTER CHOICE PUBLICATION|Exercise NUMERICALS PROBLEMS |15 Videos

  • POLARISATION OF LIGHT

    BETTER CHOICE PUBLICATION|Exercise Most Expected Questions|4 Videos

Similar Questions

Explore conceptually related problems

What is photo electric cell? Gives its two applications.

What is electric power? Give its unit.

What is electric current? Give its SI unit?

What is photo cell ? State its three applications.

What is biotechnology? Describe its two applications in the field of agriculture.

BETTER CHOICE PUBLICATION-PARTICLE NATURE OF RADIATION-SHORT ANSWER TYPE QUESTIONS
  1. Are matter waves electromagnetic?

    Text Solution

    |

  2. What is the rest mass of a photon?

    Text Solution

    |

  3. What is photo electric cells? Give its two applications.

    Text Solution

    |

  4. It is harder to remove free electrons from copper than from sodium. Wh...

    Text Solution

    |

  5. Blue light can eject electrons from a Photo-sensitive surface, while ...

    Text Solution

    |

  6. Derive Einstein's' photoelectric equation in terms of frequency.

    Text Solution

    |

  7. State the four laws of photoelectric emission.

    Text Solution

    |

  8. What are Photons? Give its two properties.

    Text Solution

    |

  9. Green light ejects electrons from a certain photosensitive surface, ye...

    Text Solution

    |

  10. Write Einsteins's photoelectric equation.

    Text Solution

    |

  11. What is phtotelecric effect?Explain the effect of increase of intensi...

    Text Solution

    |

  12. Define photoeletjric effect ,work function,stopping potential and thre...

    Text Solution

    |

  13. What are Photons? Give its two properties.

    Text Solution

    |

  14. Derive Einstein's' photoelectric equation in terms of frequency.

    Text Solution

    |

  15. What is photoelectric effect? State it laws?

    Text Solution

    |

  16. What is photoelectric cell? Explain any one of the photoelectric cells...

    Text Solution

    |

  17. What is photoelectric cell?How dies it work ?Give its practical uses.

    Text Solution

    |

  18. What is photoelectric effect?

    Text Solution

    |

  19. Write Einsteins's photoelectric equation.

    Text Solution

    |

  20. State the four laws of photoelectric emission.

    Text Solution

    |