MBOSE Class 11 Question Paper 2020 for Electronics and Hardware

(4) Total No. of Printed Pages – 4 HS/XI/V/EH/20 (d) Explain Ohm’s law in brief with the help of a diagram. 2 02 0 ELECTRONICS & HARDWARE 5. Answer the following essay-type question (Any three): ( Theory ) 3  4 = 12 (a) Explain with diagram the process of plate Full Marks : 30 earthing. Time : 1 hour (b) Calculate power and energy in 10 watthour and The figures in the margins indicate full marks for the questions draw its circuit diagram where, R = 100 ohm and D.C. battery source = 9v General Instructions: (c) What are the safety measure needed for working (i) Write all the answers in the answer script. around electrical panel and cabinet? (ii) Attempt all parts of a question together at one place. (d) Explain with block diagram how electricity is generated. Describe the working of lightning Arrester? 1. Choose the correct answer: 1 4 = 4 (a) The resultant Resistance in series circuit is (i) R  R1  R 2  R 3  V (ii) R I 1 1 1 1 (iii)    R R1 R 2 R 3 R (iv) R R1  R 2 (b) The internal resistance of an ammeter is (i) High (ii) Low HS/XI/V/EH/20 HS/XI/V/EH/20

(2) (3) (iii) Zero (c) Maximum earth resistance value of major power station is . (iv) Infinite (d) is used to join wires with metal. (c) What is the unit of electrical pressure (or electromotive force)? 3. Answer in 1 word or 1 sentence each (Any four ): 1  4 = 4 (i) Watts (a) Which form of energy is converted by solar cell into electrical energy? (ii) Amps (b) What is Inductance? (iii) Volts (c) What switch is used to control one bulb from two (iv) Current points? (d) What is Distribution Board? (d) Concealed wiring is immune to (e) Which material is used in conduit wiring? (i) Humidity (f) What is heating effect in electric current? (ii) Heat (iii) Light 4. Answer the following questions in 3 or 4 sentences (iv) Dust each (Any three): 2 3 = 6 (a) Why is PVC casing-capping preferred over wooden casing-capping wiring? 2. Fill in the blanks : 1 4 = 4 (b) Write down the colour code of A.C. power circuit (a) Switches should be connected to the wire. for single phase circuit. (b) Pliers are classified by their shape and (c) Why aluminium is the most commonly used intended work. metal for electrical wiring? HS/XI/V/EH/20 HS/XI/V/EH/20