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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 balancing point of a meter bridge is obtained at L = 40 cm. When the area of cross-section of the wire of is doubled, the balancing point shifts to L = 60 cm.
Reason (R): Resistance of wire is directly proportional to its area of cross-section .
- 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)Both A and R is false
Correct answer is option 'D'. Can you explain this answer?
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Directions : In the following questions, A statement of Assertion (A) ...
For a meter bridge, at the balancing point R/X = L/100-L area of cross section. So, the assertion is false. Resistance of wire is inversely proportional to its area of cross-section since R = R = ρL/A. So the reason is also false.
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Directions : In the following questions, A statement of Assertion (A) ...
Answer:
Explanation:
The given assertion is that the balancing point of a meter bridge is obtained at L = 40 cm. When the area of cross-section of the wire is doubled, the balancing point shifts to L = 60 cm. The reason given is that the resistance of a wire is directly proportional to its area of cross-section.
Let's analyze the given situation and the reason provided.
Meter Bridge:
- A meter bridge is a device used to measure the unknown resistance of a conductor.
- It consists of a uniform wire AB of length 100 cm, which is fixed on a wooden plank.
- A galvanometer G is connected between point A and the jockey J.
- A resistance box R is connected between points B and J.
- A jockey J is used to make contact with the wire at different points along its length.
Working Principle:
- The meter bridge works on the principle of Wheatstone bridge.
- When the jockey J is moved along the wire AB, the galvanometer shows null deflection at a particular point.
- This point is called the balancing point and is denoted by L.
Assertion Explanation:
- The balancing point on a meter bridge is obtained at L = 40 cm. This means that when the jockey is placed at L = 40 cm, the galvanometer shows null deflection, indicating that the bridge is balanced.
- When the area of cross-section of the wire is doubled, the balancing point shifts to L = 60 cm. This means that in order to balance the bridge, the jockey needs to be placed at L = 60 cm.
Reason Explanation:
- The reason stated is that the resistance of a wire is directly proportional to its area of cross-section.
- According to Ohm's law, the resistance of a conductor is given by R = ρ(l/A), where ρ is the resistivity of the material, l is the length of the conductor, and A is the area of cross-section.
- If the area of cross-section of the wire is doubled, the resistance will decrease. This means that a greater length of the wire will be required to balance the bridge, resulting in the shifting of the balancing point to L = 60 cm.
Conclusion:
- From the given explanation, it is clear that the reason provided is incorrect. The resistance of a wire is inversely proportional to its area of cross-section, not directly proportional.
- Therefore, option D, which states that both the assertion and reason are false, is the correct answer.
Explanation:
The given assertion is that the balancing point of a meter bridge is obtained at L = 40 cm. When the area of cross-section of the wire is doubled, the balancing point shifts to L = 60 cm. The reason given is that the resistance of a wire is directly proportional to its area of cross-section.
Let's analyze the given situation and the reason provided.
Meter Bridge:
- A meter bridge is a device used to measure the unknown resistance of a conductor.
- It consists of a uniform wire AB of length 100 cm, which is fixed on a wooden plank.
- A galvanometer G is connected between point A and the jockey J.
- A resistance box R is connected between points B and J.
- A jockey J is used to make contact with the wire at different points along its length.
Working Principle:
- The meter bridge works on the principle of Wheatstone bridge.
- When the jockey J is moved along the wire AB, the galvanometer shows null deflection at a particular point.
- This point is called the balancing point and is denoted by L.
Assertion Explanation:
- The balancing point on a meter bridge is obtained at L = 40 cm. This means that when the jockey is placed at L = 40 cm, the galvanometer shows null deflection, indicating that the bridge is balanced.
- When the area of cross-section of the wire is doubled, the balancing point shifts to L = 60 cm. This means that in order to balance the bridge, the jockey needs to be placed at L = 60 cm.
Reason Explanation:
- The reason stated is that the resistance of a wire is directly proportional to its area of cross-section.
- According to Ohm's law, the resistance of a conductor is given by R = ρ(l/A), where ρ is the resistivity of the material, l is the length of the conductor, and A is the area of cross-section.
- If the area of cross-section of the wire is doubled, the resistance will decrease. This means that a greater length of the wire will be required to balance the bridge, resulting in the shifting of the balancing point to L = 60 cm.
Conclusion:
- From the given explanation, it is clear that the reason provided is incorrect. The resistance of a wire is inversely proportional to its area of cross-section, not directly proportional.
- Therefore, option D, which states that both the assertion and reason are false, is the correct answer.
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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 balancing point of a meter bridge is obtained at L = 40 cm. When the area of cross-section of the wire of is doubled, the balancing point shifts to L = 60 cm.Reason (R): Resistance of wire is directly proportional to its area of cross-section .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)Both A andR is falseCorrect answer is option 'D'. Can you explain this answer?
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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 balancing point of a meter bridge is obtained at L = 40 cm. When the area of cross-section of the wire of is doubled, the balancing point shifts to L = 60 cm.Reason (R): Resistance of wire is directly proportional to its area of cross-section .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)Both A andR is falseCorrect answer is option 'D'. 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 balancing point of a meter bridge is obtained at L = 40 cm. When the area of cross-section of the wire of is doubled, the balancing point shifts to L = 60 cm.Reason (R): Resistance of wire is directly proportional to its area of cross-section .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)Both A andR is falseCorrect answer is option 'D'. 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 balancing point of a meter bridge is obtained at L = 40 cm. When the area of cross-section of the wire of is doubled, the balancing point shifts to L = 60 cm.Reason (R): Resistance of wire is directly proportional to its area of cross-section .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)Both A andR is falseCorrect answer is option 'D'. 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 balancing point of a meter bridge is obtained at L = 40 cm. When the area of cross-section of the wire of is doubled, the balancing point shifts to L = 60 cm.Reason (R): Resistance of wire is directly proportional to its area of cross-section .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)Both A andR is falseCorrect answer is option 'D'. 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 balancing point of a meter bridge is obtained at L = 40 cm. When the area of cross-section of the wire of is doubled, the balancing point shifts to L = 60 cm.Reason (R): Resistance of wire is directly proportional to its area of cross-section .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)Both A andR is falseCorrect answer is option 'D'. 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 balancing point of a meter bridge is obtained at L = 40 cm. When the area of cross-section of the wire of is doubled, the balancing point shifts to L = 60 cm.Reason (R): Resistance of wire is directly proportional to its area of cross-section .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)Both A andR is falseCorrect answer is option 'D'. 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 balancing point of a meter bridge is obtained at L = 40 cm. When the area of cross-section of the wire of is doubled, the balancing point shifts to L = 60 cm.Reason (R): Resistance of wire is directly proportional to its area of cross-section .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)Both A andR is falseCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12.
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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 balancing point of a meter bridge is obtained at L = 40 cm. When the area of cross-section of the wire of is doubled, the balancing point shifts to L = 60 cm.Reason (R): Resistance of wire is directly proportional to its area of cross-section .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)Both A andR is falseCorrect answer is option 'D'. 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 balancing point of a meter bridge is obtained at L = 40 cm. When the area of cross-section of the wire of is doubled, the balancing point shifts to L = 60 cm.Reason (R): Resistance of wire is directly proportional to its area of cross-section .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)Both A andR is falseCorrect answer is option 'D'. 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 balancing point of a meter bridge is obtained at L = 40 cm. When the area of cross-section of the wire of is doubled, the balancing point shifts to L = 60 cm.Reason (R): Resistance of wire is directly proportional to its area of cross-section .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)Both A andR is falseCorrect answer is option 'D'. 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 balancing point of a meter bridge is obtained at L = 40 cm. When the area of cross-section of the wire of is doubled, the balancing point shifts to L = 60 cm.Reason (R): Resistance of wire is directly proportional to its area of cross-section .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)Both A andR is falseCorrect answer is option 'D'. 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 balancing point of a meter bridge is obtained at L = 40 cm. When the area of cross-section of the wire of is doubled, the balancing point shifts to L = 60 cm.Reason (R): Resistance of wire is directly proportional to its area of cross-section .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)Both A andR is falseCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Class 12 tests.
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