The resistivity of a pure silicon is about _______________?

Related Mcqs:

1. The resistivity of pure germanium under standard conditions is about_______________?

   A. 6 x 104 cm
   B. 60 x cm
   C. 3 x 106 cm
   D. 6 x 10-4 cm

2. The unit of resistivity is

   A. Ω.
   B. Ω – metre.
   C. Ω / metre.
   D. Ω / m².

3. The resistivity of the conductor depends on

   A. area of the conductor.
   B. length of the conductor.
   C. type of material.
   D. none of these.

4. At room temperature, an intrinsic silicon crystal acts approximately as_______________?

   A. A battery
   B. A conductor
   C. An insulator
   D. A piece of copper wire

5. For faithful amplification by a transistor circuit, the value of VCE should______________for silicon transistor?

   A. Not fall below 1 V
   B. Be zero
   C. Be 0.2 V
   D. None of the above

6. For faithful amplification by a transistor circuit, the value of VBE should_____________for a silicon transistor?

   A. Be zero
   B. Be 0.01 V
   C. Not fall below 0.7 V
   D. Be between 0 V and 0.1 V

7. The leakage current in a silicon transistor is about_____________ the leakage current in a germanium transistor?

   A. One hundredth
   B. One tenth
   C. One thousandth
   D. One millionth

8. A silicon transistor is biased with base resistor method. If ß=100, VBE =0.7 V, zero signal collector current IC = 1 mA and VCC = 6V , what is the value of the base resistor RB ?

   A. 105 kO
   B. 530 kO
   C. 315 kO
   D. None of the above

9. When a pure semiconductor is heated, its resistance_________________?

   A. Goes up
   B. Goes down
   C. Remains the same
   D. Can’t say

10. The impurity level in an extrinsic semiconductor is about_______________of pure semiconductor ?

    A. 10 atoms for 108 atoms
    B. 1 atom for 108 atoms
    C. 1 atom for 104 atoms
    D. 1 atom for 100 atoms