CBSE Physics Solids And Semiconductor Devices Test 2 Online
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CBSE Physics Solids and Semiconductor Devices Test 2 Online

Test Name Solids and Semiconductor Devices Test
Subject CBSE Physics
Test Type MCQs
Total Question 25
Total Marks 50
Total Time 20 Minutes
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CBSE has been at the forefront of the progress in the educational field in all India. Boards exams chapters Physics basic topic of Solids and Semiconductor Devices studied officially as they manage examinations. Solids and Semiconductor devices have replaced thermionic devices (vacuum tubes) in most applications. They use electronic conduction in the solid state as opposed to the gaseous state or thermionic emission in a high vacuum. For boost your knowledge mostly helpful questions answers Mcqs test take and practice online.

CBSE Physics Solids and Semiconductor Devices Test 2 Online


1. A transistor is operated in common emitter configuration at constant collector voltage Vc = 1.5 V such that a change in the base current form 100 A to 150 A produces a change in the collector current form 5 mA to 10 mA. The current gain (β)is ?

Question 1 of 25

2. Chose only false statement from the following ?

Question 2 of 25

3. If a full wave rectifier circuit is operating form 50Hz mains, the fundamental frequency in the ripple will be ?

Question 3 of 25

4. A transistor-oscillator using a resonant circuit with a inductor L (of negligible resistance) and a capacitor C in series produce oscillations of frequency f. If L is doubled and C is changed to 4 C, the frequency will be ?

Question 4 of 25

5. Zener diode is used for ?

Question 5 of 25

6. The circuit is equivalent to ?

Question 6 of 25

7. A transistor is operated in common-emitter configuration at Vc = 2 volt such that a change in the base current from 100 μA to 200 μA produces a change in the collector current form 5 mA to 10mA. The current gain is ?

Question 7 of 25

8. Carbon, silicon and germanium atoms have four valence electrons each. Their valence and conduction bands are separated by energy band gaps represented by (Eg)c, (Eg)si and (Eg)Ge respectively. Which one of the following relationships is true in their case ?

Question 8 of 25

9. The symbolic representation of four logic gates

The logic symbols for OR, NOT and NAND gates are respectively ?

Question 9 of 25

10. Sodium has body centre packing. Distance between two nearest atoms 3.7 A°. The lattice parameter is ?

Question 10 of 25

11. Application of a forward bias to a p-n junction ?

Question 11 of 25

12. In semiconductors at a room temperature ?

Question 12 of 25

13. The voltage gain of an amplifier with 9% negative feedback is 10. The voltage gain without feedback will be ?

Question 13 of 25

14. Copper has face-centered cubic (fcc) lattice with interatomic spacing equal to spacing equal to 2.54 A°. The value of lattice constant for this lattice is ?

Question 14 of 25

15. A n-p-n transistor conducts when ?

Question 15 of 25

16. In the energy band diagram of a material shown below, the open circles anα filled circles denote holes and electrons respectively. The material is a/an ?

Question 16 of 25

17. In a p-n junction photo cell, the value of the photo-electromotive force produced by monochromatic light is proportional to ?

Question 17 of 25

18. The peak voltage in the output of a half-wave diode rectifier fed with a sinusoidal signal without filter is 10V. The DC component of the output voltage is ?

Question 18 of 25

19. A p-n photodiode is made of a material with a band gap of 2.0 eV. The minimum frequency of the radiation that can be absorbed by the material is nearly ?

Question 19 of 25

20. A p-n photodiode is fabricated from a semiconductor with a band gap of 2.5 eV. It can detect a signal of wavelength ?

Question 20 of 25

21. If the lattice parameter for a crystalline structure is 3.6 A°, then the atomic radius in fcc crystal is ?

Question 21 of 25

22. For a cubic crystal structure which one of the following relations indicating the cell characteristic is  correct ?

Question 22 of 25

23. A common emitter amplifier has a voltage gain of 50, an input impedance of 100 Ω and an output impedance of 200 Ω. The power gain of the amplifier is ?

Question 23 of 25

24. The output of OR gate is 1 ?

Question 24 of 25

25. The following figure shows a logic gate circuit with two inputs A and B and the output C. The voltage waveforms of A, B and C are as shown below ?

Question 25 of 25


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