Electronics Service Technology Model Question Paper : Plus Two / 12th Std / +2 / HSE www.dhsekerala.gov.in

[mariammal]

Document Described : Electronics Service TechnologyQuestion Paper, Kerala Question Paper

Electronics Service Technology
XII Time : 2hrs Score: 60
Cool off time : 15 min

http://dhsekerala.gov.in/ques_download.aspx
http://dhsekerala.gov.in/downloads/q...ST%20MODEL.pdf

General Instructions :
** There is a cool off time of 15 min in addition to the writing time of 2hrs.
** You are not allowed to write your answers not to discuss anything with others during the cool off time.
** Use the cool off time to get familiar with questions and to plan your answers.
** Read questions carefully before answering
** All questions are compulsory and only internal choice is allowed.
** When you select a question all the sub questions must be answered from the same question itself.
** Calculations figures and graphs should be shown in the answer sheet itself.

1. i. (624)8 =(……………)2
2. ii. (624)16 =(……………)10 (2)
7. Match the following (4)
8. There are two switches to control the output of a circuit which contain BC107as its active component. Draw the circuit and explain about its working. (4)
9. i ) Write short notes on Yagi Uda antenna (2) ii) Filters (3)
10. The working of PSTN is divided into certain layers. Draw its structure and write the functions of any two layers. (4)
11. An UPS is needed in your electronics lab. Write its type and specifications. Draw its block diagram (2)
12. To stabilize the 220V,50Hz we can use a stabilizer. Write the working of any type of stabilizer with figure (3)
13. Write any 4 comparison of Tape Recorder and CD player. (2)
14. Interlaced Scanning is better than normal scanning. Why? (3)
15. Draw the constructional details of moving coil microphone (3)
16. Radar helps us to detect the distant objects .Write its principle (2)
17. Draw the bandwidth diagram of a TV station which uses 35 MHz as its picture IF. (3)
OR
Write about the conversion of the color pictures into electrical signals in TV transmission. (3)
18. When compare with the CD, video cassette recording is complex. Justify. (2)
19. Write about total internal reflection (2)
20. a. Write one example of an OPAMP IC (1)
b. How we can construct an inverting amplifier from an OPAMP (2)
21. In your electronic lab you have to generate a square waveform of 1KHz.Draw a simple circuit (3)
22. ICs include resistors, diodes and transistors in it. Write the steps to create a diode in an IC. (2)

[Guest]

can you give the latest quetions of pluse two..which is important please

[Unregistered]

What are the applications of radar?