Question

In the circuit given below, bulb X uses 48 W when lit, bulb Y uses 22 W when lit and bulb Z uses 14.4 W when lit. The number of additional bulbs in parallel to this circuit, that would be required to below the fuse is _______________ (a) 4 (b) 5 (c) 6 (d) 7 I have been asked this question in an interview for job. The query is from Problems Involving Dot Conventions in portion Resonance & Magnetically Coupled Circuit of Network Theory Select the correct answer from above options network theory questions and answers, network theory questions pdf, network theory question bank, network theory gate questions and answers pdf, mcq on network theory pdf, gate network theory questions and solutions, network theory mcq Test , ies network theory questions, Network theory Questions for GATE EC Exam, Network Theory MCQ (Multiple Choice Questions)

Answer 1

The correct answer is (a) 4 The best explanation: IX = \frac{48}{12} = 4 A IY = \frac{22}{12} = 1.8 A IZ = \frac{14.4}{12} = 1.2 A Current required to below the fuse = 20 A ∴ Additional bulbs must draw current = 20 – (4 + 18 + 1.2) = 20 – 7 = 13 ∴ Number of additional bulbs required = \frac{13}{3} = 4.33 So, 4 additional bulbs are required.