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A dynamometer wattmeter measures power in a 50 Hz, single phase circuit without error, at all power factors. The resistance of the voltage coil and its series resistance are 400 Ω and 10,000 Ω, respectively. The series resistance has a distributed self-capacitance equivalent to a shunt capacity of 20 pF.What is the self inductance of the pressure coil?
  • a)
    5 mH
  • b)
    4 mH
  • c)
    3 mH
  • d)
    2 mH
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
A dynamometer wattmeter measures power in a 50 Hz, single phase circui...
Given, Rp = 400Ω,
RS = 10,000 Ω
CC = 20 pF
Self inductance of the pressure coil is given by
Lp = CC x RS2
= 20 x 10-12 x (104)2
= 20 x 10-4 = 2 mH
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A dynamometer wattmeter measures power in a 50 Hz, single phase circui...
Ohms and 20 ohms respectively. The resistance of the current coil and its series resistance are 0.02 ohms and 0.01 ohms respectively. The current coil is connected in series with the load while the voltage coil is connected in parallel with the load. Determine the power factor of the load when the instrument reads 100 W.
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A dynamometer wattmeter measures power in a 50 Hz, single phase circuit without error, at all power factors. The resistance of the voltage coil and its series resistance are 400 Ω and 10,000 Ω, respectively. The series resistance has a distributed self-capacitance equivalent to a shunt capacity of 20 pF.What is the self inductance of the pressure coil?a)5 mHb)4 mHc)3 mHd)2 mHCorrect answer is option 'D'. Can you explain this answer?
Question Description
A dynamometer wattmeter measures power in a 50 Hz, single phase circuit without error, at all power factors. The resistance of the voltage coil and its series resistance are 400 Ω and 10,000 Ω, respectively. The series resistance has a distributed self-capacitance equivalent to a shunt capacity of 20 pF.What is the self inductance of the pressure coil?a)5 mHb)4 mHc)3 mHd)2 mHCorrect answer is option 'D'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about A dynamometer wattmeter measures power in a 50 Hz, single phase circuit without error, at all power factors. The resistance of the voltage coil and its series resistance are 400 Ω and 10,000 Ω, respectively. The series resistance has a distributed self-capacitance equivalent to a shunt capacity of 20 pF.What is the self inductance of the pressure coil?a)5 mHb)4 mHc)3 mHd)2 mHCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A dynamometer wattmeter measures power in a 50 Hz, single phase circuit without error, at all power factors. The resistance of the voltage coil and its series resistance are 400 Ω and 10,000 Ω, respectively. The series resistance has a distributed self-capacitance equivalent to a shunt capacity of 20 pF.What is the self inductance of the pressure coil?a)5 mHb)4 mHc)3 mHd)2 mHCorrect answer is option 'D'. Can you explain this answer?.
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