Nirma University Institute of Technology Term Assignment, Odd- 2020 B. Tech. in Engineering (Division J, K), Semester–I 2EE101: ELEMENTS OF ELECTRICAL AND ELECTRONICS ENGINEERING Marks: 15 Instructions: Q.1 1. 2. 3. 4. 5. 6. Attempt all questions. Figures to right indicate full marks. Draw neat sketches whenever necessary. Assume suitable additional data if required. All symbols and notations have their usual meaning. The answers written by you will be checked for similarity hence you are informed to write the answer in your own words as far as possible. Determine the current through 5V voltage source in network shown in Fig. 1 using nodal analysis. Also, determine voltage drop across 4Ω resistor and the power loss across each resistor. 5V 1Ω 3V 1V 2Ω [5] 1Ω 2Ω 2V 4Ω Fig. 1 Q.2 An iron ring has a mean diameter of 15 cm, a cross-section of 20 cm2 and a radial air gap of 0.5 mm cut on it. The ring is uniformly wound with 1500 turns of insulated wire and a magnetizing current of 1A produces a flux of 1 mWb in the air gap. Calculate: (i) the reluctance of the magnetic circuit and (ii) the relative permeability of the iron. Q.3 Each phase of a star-connected load consists of a resistance of 100 Ω in parallel with a capacitance 31.8 µF. Calculate the line current, power absorbed, total kVA and power factor of the load when connected to a 415 V, 50 Hz three-phase supply. [5] [5]