Home
Class 12
PHYSICS
Keeping forward bias voltage from 0.6 V ...

Keeping forward bias voltage from 0.6 V to 0.7 V in a p-n junction diode its current become 1 mA to 3mA. The dynamic resistance of diode is …….

A

10 mA

B

15 mA

C

20 mA

D

5 mA

Text Solution

Verified by Experts

The correct Answer is:
D
5 mA
The voltage remains constant on zener diode.

Current in `1kOmega`
(i) `1kOmega=(15" Volt")/(1kOmega)=15mA`
Current in 250 `kOmega`
(ii) `I=((20-15)V)/(250Omega)=(5V)/(250Omega)=(20)/(1000)A=20mA`
`therefore (i)_("zener diode")=(20-15)=5mA`
Promotional Banner

Topper's Solved these Questions

  • SEMICONDUCTOR ELECTRONICS : MATERIALS, DEVICES AND SIMPLE CIRCUITS

    KUMAR PRAKASHAN|Exercise Section-D : Multiple Choice Questions (MCQs) (MCQs From .DARPAN. Based On Textbook)|116 Videos

  • SAMPLE QUESTION PAPER

    KUMAR PRAKASHAN|Exercise PART-B SECTION-C|5 Videos

  • WAVE OPTICS

    KUMAR PRAKASHAN|Exercise SECTION-D (MULTIPLCE CHOICE QUESTIONS (MCQS)) (MCQS FROM DARPAN BASED ON TEXTBOOK)|239 Videos

Similar Questions

Explore conceptually related problems

Increasing reverse bias voltage applied to p-n junction diode ……..

If current in given circuit is 0.1 A then calculate resistance of P-N junction.

In a p-n junction diode, the current I can be expressed as I=I_(0)"exp"((eV)/(2k_(B)T)-1) where I_(0) is called the reverse saturation current, V is the voltage across the diode and is positive for forward bias and negative for reverse bias, and I is the current through the diode, k_(B) is the Boltzmann constant (8.6xx10^(-5)eV//K) and T is the absolute temperature. If for a given diode I_(0)=5xx10^(-12) A and T = 300 K, then (a) What will be the forward current at a forward voltage of 0.6 V ? (b) What will be the increase in the current if the voltage across the diode is increased to 0.7 V ? (c ) What is the dynamic resistance? (d) What will be the current if reverse bias voltage changes from 1 V to 2 V ?

What is the ratio of forward and reverse resistance of p-n junction diode?

What type of p-n junction diode does not require forward bias to operate?

In a p-n junction diode, the current I can be expressed as I= I_(0) "exp" ((eV)/(2k_(B)T)-1) where I_(0) is called the reverse saturation current, V is the voltage across the diode and is positive for forward bias and negative for reverse bias, and I is the current through the diode, k_(B) is the Boltzmann constant (8.6 xx 10^(–5) eV//K) and T is the absolute temperature. If for a given diode I_(0) = 5 xx 10^(-12) A and T = 300 K, then (a) What will be the forward current at a forward voltage of 0.6 V? (b) What will be the increase in the current if the voltage across the diode is increased to 0.7 V? (c) What is the dynamic resistance? (d) What will be the current if reverse bias voltage changes from 1 V to 2 V?

At breakdown voltage the reverse current of p-n junction can be ranked mA ……. .

When monochromatic source is kept at distance of 0.2 m from photocell,cutoff voltage obtained is 0.6 V and saturation current is 18 mA.Noe if source is kept at distance of 0.6 m…….

For given CE biasing circuit, if voltage across collector-emitter is 12 V and current gain is 100 and base current is 0.04 mA then determine the value of collector resistance R_(C) . .

A sinusoidal voltage of amplitude 25 volts and frequency 50 Hz is applied to a half wave rectifier using PN diode. No filter is used and the load resistor is 1000 Omega . The forward resistance R_(f) ideal diode is 10 Omega . Calculate. (i) Peak, average and rms values of load current (ii) d.c power output (ii) a.c power input (iv) % Rectifier efficiency (v) Ripple factor.

KUMAR PRAKASHAN-SEMICONDUCTOR ELECTRONICS : MATERIALS, DEVICES AND SIMPLE CIRCUITS -Section-D : Multiple Choice Questions (MCQs) (MCQs asked in Competitive Exams)
  1. If a small amount of antimony is added to germanium crystal ………

    Text Solution

    |

  2. Pure Si at 500 K has equal number of electron (n(e )) and hole (n(h)) ...

    Text Solution

    |

  3. Keeping forward bias voltage from 0.6 V to 0.7 V in a p-n junction dio...

    Text Solution

    |

  4. In a CE transistor amplifier, the audio signal voltage across the coll...

    Text Solution

    |

  5. C and Si both have same lattice structure, having 4 bonding electrons ...

    Text Solution

    |

  6. When the inputs of a two input logic gate are 0 and 0, the output is 1...

    Text Solution

    |

  7. Justify the output waveform (Y) of the OR gate for the following input...

    Text Solution

    |

  8. The output of the given circuit in figure.

    Text Solution

    |

  9. In a n-type semiconductor, which of the following statement is true?

    Text Solution

    |

  10. The potential barrier of the p-n junction depends …….. (i) On kind o...

    Text Solution

    |

  11. In a n-type semiconductor, which of the following statement is true?

    Text Solution

    |

  12. A helicopter is moving in upward direction with speed of 10 m/s. If th...

    Text Solution

    |

  13. Which logic gate is represented by the following logic gates?

    Text Solution

    |

  14. A cell of emf E and internal resistance r is connected across an exter...

    Text Solution

    |

  15. Derive an expression for current I passing through an AC circuit conta...

    Text Solution

    |

  16. In the circuit shown the reading of voltmeter V(3) and Ammeter 'A' wil...

    Text Solution

    |

  17. Justify the output waveform (Y) of the OR gate for the following input...

    Text Solution

    |

  18. If A and B are two matrices of the order 3xxmand3xxn , respectively , ...

    Text Solution

    |

  19. Which of the following logic gate is an universal gate?

    Text Solution

    |

  20. In the circuit shown in figure, when the input voltage of the base res...

    Text Solution

    |