Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
86 views
in General by (237k points)
closed by
The increase in voltage at the receiving end of the open circuited line or lightly loaded line when compared to the sending end voltage is called:
1. Corona effect
2. Lighting effect
3. Raman effect
4. Ferranti effect

1 Answer

0 votes
by (239k points)
selected by
 
Best answer
Correct Answer - Option 4 : Ferranti effect

Ferranti Effect: At no load (or) at light load, the voltage at the receiving end of the transmission line is more than the sending voltage. It is known as the Ferranti effect. It is due to the charging current of the line.

How to reduce Ferranti effect:

  • This effect can be controlled by placing the shunt reactors at the receiving end of the lines.
  • A shunt reactor is an inductive current element connected between line and neutral to compensate for the capacitive current from transmission lines.
  • Synchronous phase modifier(SPM) is used as under excitation it works similarly to shunt reactor which absorbs lagging reactive power and delivers leading reactive power.

 

The value of the shunt reactor is given by 

\({X_{sh}} = \frac{B}{{1 - A}}\)

where A and B are T-parameter of the transmission line 

Corona Effect: 

When an alternating potential difference is applied across two conductors whose spacing is large as compared to their diameters, there is no apparent change in the condition of atmospheric air surrounding the wires if the applied voltage is low.

When the applied voltage exceeds a certain value (critical disruptive voltage), the conductors are surrounded by a faint violet glow called corona.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...