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Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.
Assertion : If the current in a solenoid is reversed in direction while keeping the same magnitude, the magnetic field energy stored in the solenoid remains unchanged.
Reason : Magnetic field energy density is proportional to the magnetic field.
  • a)
    If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
  • b)
    If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
  • c)
    If the Assertion is correct but Reason is incorrect.
  • d)
    If both the Assertion and Reason are incorrect.
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Directions: These questions consist of two statements, each printed a...
Reversing the direction of the current reverses the direction of the magnetic field. However, it has no effect on the magnetic-field energy density, which is proportional to the square of the magnitude of the magnetic field.
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Most Upvoted Answer
Directions: These questions consist of two statements, each printed a...
Assertion: If the current in a solenoid is reversed in direction while keeping the same magnitude, the magnetic field energy stored in the solenoid remains unchanged.

Reason: Magnetic field energy density is proportional to the magnetic field.

Explanation:

When analyzing the given assertion and reason, it is important to evaluate each statement separately and then determine the relationship between them.

Understanding the Assertion:
The assertion states that if the current in a solenoid is reversed in direction while keeping the same magnitude, the magnetic field energy stored in the solenoid remains unchanged.

This assertion is correct. The energy stored in a solenoid is due to the magnetic field created by the current flowing through it. When the direction of the current is reversed, the magnetic field direction also changes, but the magnitude of the magnetic field remains the same. Therefore, the energy stored in the solenoid, which is directly proportional to the magnetic field, also remains the same.

Understanding the Reason:
The reason given for the assertion is that magnetic field energy density is proportional to the magnetic field.

This reason is correct. Magnetic field energy density refers to the amount of energy stored per unit volume in the magnetic field. It is given by the equation:

Energy density (U) = (1/2) * μ₀ * B²

Where μ₀ is the permeability of free space and B is the magnetic field. As we can see from the equation, the energy density is directly proportional to the square of the magnetic field. Therefore, if the magnetic field remains the same, the energy density and hence the energy stored in the solenoid also remain the same.

Relationship between the Assertion and Reason:
The reason provided is a correct explanation of the assertion. The assertion states that the magnetic field energy stored in the solenoid remains unchanged when the current is reversed, and the reason explains this by stating that the energy density is proportional to the magnetic field. Since the magnetic field remains the same when the current is reversed, it follows that the energy stored in the solenoid remains unchanged.

Therefore, the correct answer is option 'C': If the Assertion is correct but Reason is incorrect.
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Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.Assertion : If the current in a solenoid is reversed in direction while keeping the same magnitude, the magnetic field energy stored in the solenoid remains unchanged.Reason : Magnetic field energy density is proportional to the magnetic field.a)If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.b)If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.c)If the Assertion is correct but Reason is incorrect.d)If both the Assertion and Reason are incorrect.Correct answer is option 'C'. Can you explain this answer?
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Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.Assertion : If the current in a solenoid is reversed in direction while keeping the same magnitude, the magnetic field energy stored in the solenoid remains unchanged.Reason : Magnetic field energy density is proportional to the magnetic field.a)If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.b)If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.c)If the Assertion is correct but Reason is incorrect.d)If both the Assertion and Reason are incorrect.Correct answer is option 'C'. 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: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.Assertion : If the current in a solenoid is reversed in direction while keeping the same magnitude, the magnetic field energy stored in the solenoid remains unchanged.Reason : Magnetic field energy density is proportional to the magnetic field.a)If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.b)If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.c)If the Assertion is correct but Reason is incorrect.d)If both the Assertion and Reason are incorrect.Correct answer is option 'C'. 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: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.Assertion : If the current in a solenoid is reversed in direction while keeping the same magnitude, the magnetic field energy stored in the solenoid remains unchanged.Reason : Magnetic field energy density is proportional to the magnetic field.a)If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.b)If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.c)If the Assertion is correct but Reason is incorrect.d)If both the Assertion and Reason are incorrect.Correct answer is option 'C'. Can you explain this answer?.
Solutions for Directions: These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses.Assertion : If the current in a solenoid is reversed in direction while keeping the same magnitude, the magnetic field energy stored in the solenoid remains unchanged.Reason : Magnetic field energy density is proportional to the magnetic field.a)If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.b)If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.c)If the Assertion is correct but Reason is incorrect.d)If both the Assertion and Reason are incorrect.Correct answer is option 'C'. 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.
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