ELEKTRONIKAI ALAPISMERETEK ANGOL NYELVEN

Átírás

1 ÉRETTSÉGI VIZSGA május 23. ELEKTRONIKAI ALAPISMERETEK ANGOL NYELVEN KÖZÉPSZINTŰ ÍRÁSBELI VIZSGA május 23. 8:00 Az írásbeli vizsga időtartama: 180 perc Pótlapok száma Tisztázati Piszkozati EMBERI ERŐFORRÁSOK MINISZTÉRIUMA Elektronikai alapismeretek angol nyelven középszint írásbeli vizsga 1211

2 Important information You may use only a pocket calculator which cannot store or display texts, drawing tools, patterns, and rulers as auxiliary tools for solving this written examination. Use a blue-ink pen for writing and a black lead pencil for drawing. When solving simple short questions, use the space below each question. When solving complex questions, use supplementary sheets to be distributed by supervising teachers, after writing your name and class on them. Attach a page number to each supplementary sheet. When solving questions which include calculations, take care to write down relationships (formulas) correctly, do substitutions precisely, and make calculations accurately. If you fail on any of these aspects, points will be deducted from your score. You will be rewarded with the full score for an end-result only when both its amount and its measurement unit are fully correct. When solving questions, take care to produce a neat and well organised written test, use standard symbols, and meet requirements in terms of engineering, format, and aesthetics. If you fail on any of these aspects, points will be deducted from your score. Cross erroneous parts, if any, in your solution by a diagonal line. Within the time frame available for solving the exam, you may also prepare a fair copy. In that case, you will prepare a Draft copy and a Fair copy by attaching continuous page numbers to the sheets. írásbeli vizsga / május 23.

3 Simple short questions Maximum score: 40 1.) Determine the current flowing through resistor R 3. R 1 I 1 I 3 U R 2 R 3 Data: I 1 30 ma R Ω R Ω I 3 2.) Determine the DC resistance of a coil. The coil is made from a wire with a diameter d 0.3 mm, a length l 20 m, and a specific resistance ρ Ω mm 2 /m. (4 points) R 3.) The table below must express the relationship between the plate area and capacitance of a flat plate capacitor. Complete the table. A (cm 2 ) C (pf) 90 4.) Determine the capacitance of a capacitor with a capacitive reactance of X C 1 kω at a frequency of f 500 Hz. C 5.) Determine the impedance of the dipole below. (4 points) L R C Data: X L 500 Ω R 300 Ω X C 900 Ω Z 6.) Determine the effective power of a single-phase AC consumer. Data: U 230 V, I 6 A, cos φ 0.8. P írásbeli vizsga / május 23.

4 7.) Determine the current through the Zener diode. Data: I 24 ma, U Z 6 V, R l 1 kω. I R U Z I Z U Z I l R l I Z 8.) Determine the value of the collector resistance. Data: U t 9 V, U CE0 4 V, I C0 5 ma. +U t R B1 R C T I C0 U CE0 R C R B2 9.) Draw a circuit with a voltage amplification of A u 4, by using one operational amplifier and three resistors (R 1 30 kω, R 2 24 kω, R kω). A neat hand-drawn chart will be sufficient. (4 points) 10.) Determine the current amplification of an amplifier at known voltage amplification (A u ), input resistance (R in ), and load resistance (R l ). Data: A u 50, R in 3 kω, R l 2 kω. (4 points) A i 11.) Using the algebraic method, simplify the logic function below. F 3 3 F A B C + A B C + A C 12.) Write down the serial number form of the logic function below. Symbol A is used to denote the variable with the highest place value. ( A + B + C + D) ( A + B + C + D) ( A + B + C + D) ( A + B + C D) F F írásbeli vizsga / május 23.

5 Complex questions Maximum score: 60 Question 1 Maximum score: 15 Calculate a DC circuit I I 2 Data: I 1 I 3 I 4 U 12 V R Ω U R 1 R 3 R 4 R Ω R R 3 1 kω 2 R kω Tasks: a) Determine the resultant resistance on the generator (R) and the current flowing through it (I). b) Determine the current (I 2 ) flowing through R 2 and the voltage (U 2 ) appearing across it. c) Determine the voltages (U 3, U 4 ) and currents (I 3, I 4 ) of resistors R 3 and R 4 respectively. Question 2 Maximum score: 15 Calculate an AC circuit I U U L L R U R Data: U 24 V f 50 Hz L 400 mh R 150 Ω Tasks: a) Determine the inductive reactance (X L ), and the current used by the circuit (I). b) Determine the voltages (U L, U R ) appearing across the inductor and the resistor, respectively. c) Prepare a vector diagram to the correct scale for the current (I) and the voltages (U, U L, U R ). Scales: 20 ma 1cm, and 5 V 1cm. d) Determine the absolute value of the phase angle (φ) between U and U R. írásbeli vizsga / május 23.

6 Question 3 Maximum score: 15 Calculate a common source amplifier basic circuit The simplified AC schematic representation of the amplifier is as follows: R g In i in y 21S u GS i D Out i out u g u in R G 1 y 22S R D u out R l Data: u g 200 mv R g 50 kω R G 200 kω R D 10 kω R l 15 kω y 21S 4.5 ms y 22S 28 µs Tasks: a) Draw an amplifier circuit which corresponds to the above schematic representation by using one n-channel JFET, three resistors (R G, R D, R S ), and three capacitors (C in, C out, C S ). The circuit diagram does not have to contain the control signal source and the resistor. A neat hand-drawn chart will be sufficient. b) Determine the output resistance of the amplifier stage (R out ). c) Determine the voltage amplification of the amplifier (A u ). d) Determine the input and output voltages (u in, u out ) of the amplifier. Question 4 Maximum score: 15 Design a logic network The serial number form of the logic function is known as follows: F 4 Σ 4 ( 2, 4, 5, 6, 7, 10, 12, 14) Tasks: a) Simplify the function above by using the graphical method. Use symbol A to denote the variable with the highest place value. b) Realise the simplified function by using NOT-AND-OR gates. The variables are available in original form only. c) Realise the simplified function by using NAND gates. The variables are available in original form only. írásbeli vizsga / május 23.

7 írásbeli vizsga / május 23.

8 Topics Serial number of question Maximum score Simple short questions Complex questions Achieved score Maximum score for topic Total score of the written examination 100 Achieved score for topic Correcting teacher Date:... Egyszerű, rövid feladatok/ Simple short questions Összetett feladatok/ Complex questions pontszáma egész számra kerekítve/ achieved score rounded to the next integer programba beírt egész pontszám/ integer score entered in programme Javító tanár/correcting teacher Jegyző/Notary Dátum/Date:... Dátum/Date:... írásbeli vizsga / május 23.