Class 12 Exam > Class 12 Questions > Directions : In the following questions, A s...
Start Learning for Free
Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.
Assertion (A): The dimension of L/R is time.
Reason (R): Time constant (L/R) should be increased to reduce the rate of increase of current through a solenoid.
- a)Both A and R are true and R is the correct explanation of A
- b)Both A and R are true but R is NOT the correct explanation of A
- c)A is true but R is false
- d)A is false and R is true
Correct answer is option 'B'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
Directions : In the following questions, A statement of Assertion (A)...
For a solenoid, the magnitude of induced emf
View all questions of this test
In left hand side of the above equation, denominator is time. So, in right hand side, the denominator should be time. So, dimension of L/R is time. So, the assertion is true. If L/R increases, di/dt decreases. So, reason is also true. But reason cannot properly explain the assertion.
Most Upvoted Answer
Directions : In the following questions, A statement of Assertion (A)...
Assertion (A): The dimension of L/R is time.
Reason (R): Time constant (L/R) should be increased to reduce the rate of increase of current through a solenoid.
Explanation:
Dimension of L/R:
- The dimension of L/R can be determined by analyzing the units of inductance (L) and resistance (R).
- The unit of inductance is Henry (H), which is equal to V·s/A (volt-seconds per ampere).
- The unit of resistance is Ohm (Ω), which is equal to V/A (volt per ampere).
- Therefore, the unit of L/R will be (V·s/A) / (V/A) = s (seconds).
- Hence, the dimension of L/R is time.
Time constant (L/R) and rate of increase of current:
- The time constant (L/R) of an RL circuit is a measure of how quickly the current through the inductor reaches its maximum value.
- It is given by the ratio of inductance (L) to resistance (R) in the circuit.
- A higher time constant indicates a slower rate of increase of current through the solenoid.
- Increasing the time constant can be achieved by either increasing the inductance or increasing the resistance in the circuit.
- By increasing the time constant, the rate of increase of current through the solenoid can be reduced.
Conclusion:
- Both the assertion and the reason are true.
- The dimension of L/R is indeed time.
- The reason correctly explains that increasing the time constant (L/R) can reduce the rate of increase of current through a solenoid.
- Therefore, option B is the correct answer.
Reason (R): Time constant (L/R) should be increased to reduce the rate of increase of current through a solenoid.
Explanation:
Dimension of L/R:
- The dimension of L/R can be determined by analyzing the units of inductance (L) and resistance (R).
- The unit of inductance is Henry (H), which is equal to V·s/A (volt-seconds per ampere).
- The unit of resistance is Ohm (Ω), which is equal to V/A (volt per ampere).
- Therefore, the unit of L/R will be (V·s/A) / (V/A) = s (seconds).
- Hence, the dimension of L/R is time.
Time constant (L/R) and rate of increase of current:
- The time constant (L/R) of an RL circuit is a measure of how quickly the current through the inductor reaches its maximum value.
- It is given by the ratio of inductance (L) to resistance (R) in the circuit.
- A higher time constant indicates a slower rate of increase of current through the solenoid.
- Increasing the time constant can be achieved by either increasing the inductance or increasing the resistance in the circuit.
- By increasing the time constant, the rate of increase of current through the solenoid can be reduced.
Conclusion:
- Both the assertion and the reason are true.
- The dimension of L/R is indeed time.
- The reason correctly explains that increasing the time constant (L/R) can reduce the rate of increase of current through a solenoid.
- Therefore, option B is the correct answer.
|
Explore Courses for Class 12 exam
|
|
Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): The dimension of L/R is time.Reason (R): Time constant (L/R) should be increased to reduce the rate of increase of current through a solenoid.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'B'. Can you explain this answer?
Question Description
Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): The dimension of L/R is time.Reason (R): Time constant (L/R) should be increased to reduce the rate of increase of current through a solenoid.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'B'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): The dimension of L/R is time.Reason (R): Time constant (L/R) should be increased to reduce the rate of increase of current through a solenoid.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): The dimension of L/R is time.Reason (R): Time constant (L/R) should be increased to reduce the rate of increase of current through a solenoid.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'B'. Can you explain this answer?.
Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): The dimension of L/R is time.Reason (R): Time constant (L/R) should be increased to reduce the rate of increase of current through a solenoid.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'B'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): The dimension of L/R is time.Reason (R): Time constant (L/R) should be increased to reduce the rate of increase of current through a solenoid.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): The dimension of L/R is time.Reason (R): Time constant (L/R) should be increased to reduce the rate of increase of current through a solenoid.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'B'. Can you explain this answer?.
Solutions for Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): The dimension of L/R is time.Reason (R): Time constant (L/R) should be increased to reduce the rate of increase of current through a solenoid.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12.
Download more important topics, notes, lectures and mock test series for Class 12 Exam by signing up for free.
Here you can find the meaning of Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): The dimension of L/R is time.Reason (R): Time constant (L/R) should be increased to reduce the rate of increase of current through a solenoid.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): The dimension of L/R is time.Reason (R): Time constant (L/R) should be increased to reduce the rate of increase of current through a solenoid.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): The dimension of L/R is time.Reason (R): Time constant (L/R) should be increased to reduce the rate of increase of current through a solenoid.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): The dimension of L/R is time.Reason (R): Time constant (L/R) should be increased to reduce the rate of increase of current through a solenoid.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion (A): The dimension of L/R is time.Reason (R): Time constant (L/R) should be increased to reduce the rate of increase of current through a solenoid.a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false and R is trueCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice Class 12 tests.
|
|
Explore Courses for Class 12 exam
|
|
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