Home
Class 12
PHYSICS
In a triode, cathode, grid and plate are...

In a triode, cathode, grid and plate are at 0, – 2 and 80 V respectively. The electrons is emitted from the cathode with energy 3 eV . The energy of the electron reaching the plate is

A

77 eV

B

85 eV

C

81 eV

D

83 eV

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • ELECTRONICS

    ERRORLESS |Exercise Graphical Questions|3 Videos

  • ELECTRON, PHOTON, PHOTOELECTRIC EFFECT AND X-RAYS

    ERRORLESS |Exercise Self Evaluation Test|3 Videos

  • ELECTROSTATICS

    ERRORLESS |Exercise Ordinary Thinking Objective Questions (Electric Flux and Gauss.s Law)|28 Videos

Similar Questions

Explore conceptually related problems

An electron jump from the fourth energy level to the first energy are emitted ?

If the electron jumps from 7.00 eV energy level to 5.0 eV energy level it

if electron falls from n=3 to n=2, then emitted energy is

In a photoelectric effect experiment, for radiation with frequency v_0 with hv_0 = 8eV, electrons are emitted with energy 2 eV. What is the energy of the electrons emitted for incoming radiation of frequency 1.25 v_0 ?

Cathode rays in a discharge tube are made up of electrons emitted from the plate that is connected to the negative terminal of the DC voltage source.

An electron having charge e and mass m starts from the lower plate of two metallic plates separated by a distance d . If the potential difference between the plates is V , the time taken by the electron to reach the upper plate is given by .

Photons with energy 5 eV are incident on a cathode C in a photoelectric cell . The maximum energy of emitted photoelectrons is 2 eV . When photons of energy 6 eV are incident on C , no photoelectrons will reach the anode A , if the stopping potential of A relative to C is

ERRORLESS -ELECTRONICS-Selv Evaluation Test
  1. Two identical capacitors A and B are charged to the same potential V a...

    Text Solution

    |

  2. In transistor, forward bias is always smaller than the reverse bias. T...

    Text Solution

    |

  3. In NPN transistor, if doping in base region is increased then collecto...

    Text Solution

    |

  4. In the following circuit I(1) and I(2) are respectively

    Text Solution

    |

  5. In space charge limited region, the plate current in a diode is 10 mA ...

    Text Solution

    |

  6. A triode has a plate resistance of 10 k Omega and amplification factor...

    Text Solution

    |

  7. Pure sodium (Na) is a good conductor of electricity because the 3s and...

    Text Solution

    |

  8. Would there be any advantage to adding n-type or p-type impurities to ...

    Text Solution

    |

  9. In the following common emitter circuit if beta=100, V(CE)=7 V, V(BE)=...

    Text Solution

    |

  10. When a battery is connected to a P-type semiconductor with a metallic ...

    Text Solution

    |

  11. Is the ionisation energy of an isolated free atom different from the i...

    Text Solution

    |

  12. In the following circuit, a voltmeter V is connected across a lamp L. ...

    Text Solution

    |

  13. For given electric voltage signal dc value is

    Text Solution

    |

  14. When a silicon PN junction is in forwards biased condition with series...

    Text Solution

    |

  15. In the following circuit the equivalent resistance between A and B is

    Text Solution

    |

  16. In the following circuit of PN junction diodes D(1),D(2) and D(3) are ...

    Text Solution

    |

  17. In circuit in following figure the value of Y is-

    Text Solution

    |

  18. A waveform shown when applied to the following circuit will produce wh...

    Text Solution

    |

  19. In a triode, cathode, grid and plate are at 0, – 2 and 80 V respective...

    Text Solution

    |

  20. The energy gap of silicon is 1.5 eV . At what wavelength the silicon w...

    Text Solution

    |