A single-phase transmission line of impedance j0.8 ohm supplies a resistive load of 500 A at 300 V. The sending end power factor is ________

This question was previously asked in
ISRO (VSSC) Technical Assistant Electrical 2017 Official Paper
View all ISRO Technician Papers >
  1. Unity
  2. 0.8 lagging
  3. 0.8 leading
  4. 0.6 lagging

Answer (Detailed Solution Below)

Option 4 : 0.6 lagging
Free
DRDO Technician Fitter (Rank Booster): Mini Mock Test
5.1 K Users
60 Questions 60 Marks 45 Mins

Detailed Solution

Download Solution PDF

Given: Impedance = j0.8 Ω, Current = 500 A, Voltage = 300 V

We know that

VS = VR + IZS

Here VS = Sending voltage, VR = Receiving end voltage, ZS = Line impedance

VS = VR + IZS = 300 + 500 × 0.8j = 300 + 400j = 500∠53.13°

Power factor = cos 53.13° = 0.6 lagging
Latest ISRO Technician Updates

Last updated on May 28, 2025

-> ISRO Technician recruitment notification 2025 has been released. 

-> Candidates can apply for the ISRO recruitment 2025 for Technicians from June 2. 

-> A total of 64 vacancies are announced for the recruitment of Technician. 

-> The selection of the candidates is based on their performance in the Written Exam and Skill Test. 

-> Candidates who want a successful selection must refer to the ISRO Technician Previous Year Papers to increase their chances of selection for the Technician post. 

More Transmission Lines Questions

Get Free Access Now
Hot Links: teen patti bliss teen patti joy apk all teen patti