Semiconductor Electronics Three Marks Questions

12th Standard EM

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Physics

Time : 01:00:00 Hrs
Total Marks : 45
    15 x 3 = 45
  1. Explain the formation of PN junction diode. Discuss its V-I characteristics.

  2. Draw the circuit diagram' of a half wave rectifier and explain its working

  3. Explain the construction and working of a full wave rectifier.

  4. Write notes on Photodiode

  5. Explain the working principle of a solar cell. Mention its applications.

  6. Sketch the static characteristics of a common emitter transistor and bring out the essence of input and output characteristics.

  7. Describe the function of a transistor as an amplifier with the neat.circuit diagram. Sketch the input and output wave form.

  8. Transistor functions as a switch. Explain.

  9. State Boolean laws. Elucidate how they are used to simplify Boolean expressions with suitable example.

  10. An ideal diode and a 5 Ω resistor are connected in series with a 15 V power supply as shown in figure below. Calculate the current that flows through the diode.

  11. Consider an ideal junction diode. Find the value of current flowing through AB is

  12. Find the current through the Zener diode when the load resistance is 1 KΩ. Use diode approximation.

  13. Determine the wavelength of light emitted from LED which is made up of GaAsP semiconductor whose forbidden energy gap is 1.875 eV. Mention the colour of the light emitted (Take h = 6.6 × 10-34 Js).

  14. In a transistor connected in the common base configuration, α = 0.95, IB = mA. Calculate the values of IC and IB

  15. The output characteristics of a transistor connected in common emitter mode is shown in the figure. Determine the value of IC when VCE = 15 V. Also determine the value of IC when VCE is changed to 10 V

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