Electrical Engineering (EE) Exam > Electrical Engineering (EE) Questions > A coil with a certain number of turns has a s...
Start Learning for Free
A coil with a certain number of turns has a specified time constants. If the number of turns is doubled, its time constant would
- a)remain unaffected
- b)becomes double
- c)becomes four-fold
- d)get halved
Correct answer is option 'B'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
A coil with a certain number of turns has a specified time constants. ...
On doubling number of turns, inductance becomes four times as inductance is proportional to number of turns squared and resistance is only doubled, since time constant is inductance upon resistance, new time constant becomes 2T.
Most Upvoted Answer
A coil with a certain number of turns has a specified time constants. ...
Time Constant of a Coil with a Certain Number of Turns
The time constant of a coil is the product of its inductance and resistance. It represents the time taken for the current in the coil to reach 63.2% of its maximum value when a voltage is applied. It is denoted by the symbol τ (tau).
Mathematically, time constant τ = L/R, where L is the inductance of the coil and R is its resistance.
Effect of Doubling the Number of Turns on Time Constant
When the number of turns in a coil is doubled, its inductance also doubles. This is because the inductance of a coil is directly proportional to the square of the number of turns.
Therefore, if the number of turns in a coil is doubled, its inductance becomes 4 times its original value.
However, the resistance of the coil remains the same, as it depends on the material and dimensions of the wire used.
Substituting the new values of L and R in the formula for time constant, we get:
New time constant τ' = (4L)/R = 4(L/R) = 4τ
Therefore, the time constant of the coil becomes 4 times its original value when the number of turns is doubled. Thus, the correct option is B - the time constant becomes double.
The time constant of a coil is the product of its inductance and resistance. It represents the time taken for the current in the coil to reach 63.2% of its maximum value when a voltage is applied. It is denoted by the symbol τ (tau).
Mathematically, time constant τ = L/R, where L is the inductance of the coil and R is its resistance.
Effect of Doubling the Number of Turns on Time Constant
When the number of turns in a coil is doubled, its inductance also doubles. This is because the inductance of a coil is directly proportional to the square of the number of turns.
Therefore, if the number of turns in a coil is doubled, its inductance becomes 4 times its original value.
However, the resistance of the coil remains the same, as it depends on the material and dimensions of the wire used.
Substituting the new values of L and R in the formula for time constant, we get:
New time constant τ' = (4L)/R = 4(L/R) = 4τ
Therefore, the time constant of the coil becomes 4 times its original value when the number of turns is doubled. Thus, the correct option is B - the time constant becomes double.
Attention Electrical Engineering (EE) Students!
To make sure you are not studying endlessly, EduRev has designed Electrical Engineering (EE) study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Electrical Engineering (EE).
|
Explore Courses for Electrical Engineering (EE) exam
|
|
Similar Electrical Engineering (EE) Doubts
Top Courses for Electrical Engineering (EE)View all
A coil with a certain number of turns has a specified time constants. If the number of turns is doubled, its time constant woulda)remain unaffectedb)becomes doublec)becomes four-foldd)get halvedCorrect answer is option 'B'. Can you explain this answer?
Question Description
A coil with a certain number of turns has a specified time constants. If the number of turns is doubled, its time constant woulda)remain unaffectedb)becomes doublec)becomes four-foldd)get halvedCorrect answer is option 'B'. 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 coil with a certain number of turns has a specified time constants. If the number of turns is doubled, its time constant woulda)remain unaffectedb)becomes doublec)becomes four-foldd)get halvedCorrect answer is option 'B'. 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 coil with a certain number of turns has a specified time constants. If the number of turns is doubled, its time constant woulda)remain unaffectedb)becomes doublec)becomes four-foldd)get halvedCorrect answer is option 'B'. Can you explain this answer?.
A coil with a certain number of turns has a specified time constants. If the number of turns is doubled, its time constant woulda)remain unaffectedb)becomes doublec)becomes four-foldd)get halvedCorrect answer is option 'B'. 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 coil with a certain number of turns has a specified time constants. If the number of turns is doubled, its time constant woulda)remain unaffectedb)becomes doublec)becomes four-foldd)get halvedCorrect answer is option 'B'. 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 coil with a certain number of turns has a specified time constants. If the number of turns is doubled, its time constant woulda)remain unaffectedb)becomes doublec)becomes four-foldd)get halvedCorrect answer is option 'B'. Can you explain this answer?.
Solutions for A coil with a certain number of turns has a specified time constants. If the number of turns is doubled, its time constant woulda)remain unaffectedb)becomes doublec)becomes four-foldd)get halvedCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Electrical Engineering (EE).
Download more important topics, notes, lectures and mock test series for Electrical Engineering (EE) Exam by signing up for free.
Here you can find the meaning of A coil with a certain number of turns has a specified time constants. If the number of turns is doubled, its time constant woulda)remain unaffectedb)becomes doublec)becomes four-foldd)get halvedCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
A coil with a certain number of turns has a specified time constants. If the number of turns is doubled, its time constant woulda)remain unaffectedb)becomes doublec)becomes four-foldd)get halvedCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for A coil with a certain number of turns has a specified time constants. If the number of turns is doubled, its time constant woulda)remain unaffectedb)becomes doublec)becomes four-foldd)get halvedCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of A coil with a certain number of turns has a specified time constants. If the number of turns is doubled, its time constant woulda)remain unaffectedb)becomes doublec)becomes four-foldd)get halvedCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice A coil with a certain number of turns has a specified time constants. If the number of turns is doubled, its time constant woulda)remain unaffectedb)becomes doublec)becomes four-foldd)get halvedCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice Electrical Engineering (EE) tests.
|
|
Explore Courses for Electrical Engineering (EE) exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup