NBSE Class 11 Question Paper 2021 for Electronics and Hardware

Total number of printed pages : 2 NB-XI/E&H(V) 2021 Electronics & Hardware (Vocational) Total marks : 50 Time : 2 hours General instructions : i) Approximately 15 minutes is allotted to read the question paper and revise the answers. ii) All questions are compulsory except Q. nos.18 to 23 where general option is given. iii) The question paper consists of 23 questions. iv) Marks allocated to every question are indicated against it. N.B: Check that all pages of the question paper are complete as indicated on the top left side. 1. Choose the correct answer from the given alternatives: 10x1=10 i. It refers to the flow of electric charge carried by electrons as they jump from atom to atom. (a) Electric circuit (b) Electric current (c) Voltage (d) Watts ii. A typical household electrical outlet is (a) 5A (b) 10A (c) 15A (d) 20A iii. The terminals of FET are (a) gate, source, drain (b) gate, anode, cathode (c) gate, source, cathode (d) gate, drain, cathode iv. Which of the following is typically marked with ‘Q’ on a circuit board? (a) Transformers (b) Transistors (c) Capacitors (d) Resistors v. The safety distance from overhead power transmission lines is (a) 5m (b) 8m (c) 12m (d) 15m vi. Which of the following connection is done in house wiring? (a) Parallel (b) Series (c) Series-parallel (d) Batten wiring vii. Which type of switch is required for staircase wiring? (a) Four way switch (b) Three way switch (c) Two way switch (d) One way switch viii. Which method is used to receive information from the sender? (a) Listening (b) Speaking (c) Reading (d) Writing ix. Which menu option has the commands such as Save, Print and Close? (a) Insert (b) File (c) Tools (d) Format x. It means not to give up and keep going even when a difficult situation comes up. (a) Self confidence (b) Independence (c) Perseverance (d) Positive attitude

-2- NB-XI/E&H(V) Answer the following questions in one word or one sentence: 2. What is voltage? 1 3. What is a diode? 1 4. What are inductors? 1 5. What is skin effect? 1 6. What is wire stripper? 1 7. Mention any two basic principles of professional communication skills. 1 8. What is a word processor? 1 9. What is entrepreneurship? 1 Answer the following questions in 20-50 words: 10. State Ohm’s law and write its formula. 1+1=2 11. What is transistor? Name any two types of transistor. 1+1=2 12. What is electrical cable? Mention any two types of electrical cable. 1+1=2 13. What are the injuries that results from electrical current? 2 14. Name any two electronic measuring tools and write their functions. 1+1=2 15. What is conduit wiring? 2 16. Write any two importance of personal hygiene. 2 17. What is sustainable development? Give example. 1+1=2 Answer any four from the following questions in 60-100 words: 18. What is resistor? State any three laws of resistance. 1+3=4 19. What is earthing? Briefly explain the two types of earthing. 1+3=4 20. Write any four safety tips for working with power tools. 4 21. Explain electromechanical assembly. 4 22. Write any four considerations to be followed in electrical wiring. 4 23. What is electrical hazard? Mention any three guidelines for working on or near electrical equipment and conductor. 1+3=4 ******************************************