Home
Class 12
PHYSICS
Assertion: Photoecell is called electric...

Assertion: Photoecell is called electric eye.
Reason: Photocell can see tha things placed before it.

A

If both, Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

B

If both, Assertion and Reason are true but Reason is not a correct explanation of the Assertion.

C

If Assertion is true but the Reason is false.

D

If both Assertion and Reason are false.

Text Solution

Verified by Experts

The correct Answer is:
c

Here Assertion is correct but Reason is wrong. Photocell converts light energy into electric current energy which is used for velocity of uses.
Promotional Banner

Topper's Solved these Questions

  • DUAL NATURE OF RADIATION AND MATTER

    PRADEEP|Exercise Value based question|1 Videos
  • CURRENT ELECTRICITY

    PRADEEP|Exercise Problems for Practice (B)|2 Videos
  • ELECTROMAGNETIC INDUCTION & ALTERNATING CURRENT

    PRADEEP|Exercise Multiple Choice Questions|1 Videos

Similar Questions

Explore conceptually related problems

Assertion:- A photocell is called an electric eye. Reason:- The electric current in a photocell depends upon the incidne light.

Why is a photoelectric cell also called an electric eye?

Assertion : A photocell is a technological application of the photoelectric effect. Reason : Photocell is a device whose electric properties are affected by electricity.

Assertion: Adiantum caudatum is called walking ferm. Reason: It can reproduce by its leaf tips.

Assertion : Iris of eye is called diaphragm of the eye. Reason : Iris closes the eye to protect from injury, entry of insects, etc.

Assertion : Calabar swelling is caused by eye worm Reason : Loa loa is called the 'eye worm'

Assertion: Plutonium is a transuranic element. Reason: The materials which can undergo fission easily are called transuranic element.

Assertion : Ionisation of transition metals involves loss of ns electron before (n - 1)d electrons. Reason : Filling of ns-orbitals takes placed before (n - 1)d orbitals.

PRADEEP-DUAL NATURE OF RADIATION AND MATTER-Exercise
  1. The work function of Silver and sodium are 4.6 and 2.3 eV, respective...

    Text Solution

    |

  2. A 25 watt bulb, which is producing monochromatic light of wavelength 6...

    Text Solution

    |

  3. A parallel beam of monochromatic light of wavelength 600nm is incident...

    Text Solution

    |

  4. A proton is fired from very far away towards a nucleus with charge Q ...

    Text Solution

    |

  5. De-broglie wavelength associated with an electron accelerated through ...

    Text Solution

    |

  6. Find the energy that should be added to an electron of energy 2eV to r...

    Text Solution

    |

  7. Assertion: Light of frequency 1.5 times the threshold frequency is inc...

    Text Solution

    |

  8. Assertion : Photoelectric effect demonstrates the wave nature of light...

    Text Solution

    |

  9. Assertion: Photoecell is called electric eye. Reason: Photocell can ...

    Text Solution

    |

  10. Assertion: An electron microscop can achieve better resolving power th...

    Text Solution

    |

  11. Assertiom: The de-broglie wavelength of a neutrons when its kinetic en...

    Text Solution

    |

  12. Assertion: The de-broglie wavelength equation has significance for any...

    Text Solution

    |

  13. Assertion: A particle of mass M at rest decays into two particles of m...

    Text Solution

    |

  14. Statement-1: The photoelectrons produced by a monochromatic light beam...

    Text Solution

    |

  15. This question has statement - 1 and statement - 2 of the four choice g...

    Text Solution

    |

  16. Statement - 1 : When ultraviolet light is incident on a photocell , it...

    Text Solution

    |

  17. Assertion : A laser beam 0.2 W power can drill holes through a metal s...

    Text Solution

    |

  18. Statement-1: A small metal ball is suspended in a uniform electric fie...

    Text Solution

    |

  19. Statement-1: An electron of mass m when accelerated through a potentia...

    Text Solution

    |

  20. Statement-1: Davisson-Germer experiment established the wave nature of...

    Text Solution

    |