Question

The CT supplies current to the current coil of a wattmeter power factor meter, energy meter and, an ammeter. These are connected as? (a) All coils in parallel (b) All coils in series (c) Series-parallel connection with two in each arm (d) Series-parallel connection with one in each arm This question was posed to me in an interview for job. My query is from Advanced Problems on Magnetically Coupled Circuits topic 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

Right answer is (b) All coils in series Explanation: Since the CT supplies the current to the current coil of a wattmeter, therefore the coils are connected in series so that the current remains the same. If they were connected in parallel then the voltages would have been same but the currents would not be same and thus efficiency would decrease.