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Which of the following statements is false ?
- a)A rheostat can be used as a potential divider
- b)Kirchhoff's second law represents energy conservation
- c)Wheatstone bridge is the most sensitive when all the four resistances are of the same order of magnitude.
- d)In a balanced wheatstone bridge if the cell and the galvanometer are exchanged, the null point is disturbed.
Correct answer is option 'D'. Can you explain this answer?
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Which of the following statements is false ?a)A rheostat can be used a...
On balancing condition
On balancing condition
.... (2)As we see both equation (1) & (2) are same. So 4th statement is false.
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Which of the following statements is false ?a)A rheostat can be used a...
Rheostat as a potential divider:
A rheostat is a variable resistor that can be used in a circuit to control the flow of electric current. It can be connected in series with a load to vary the potential difference across the load. By adjusting the position of the sliding contact on the rheostat, we can change the resistance and hence the potential difference. Therefore, statement (a) is true.
Kirchhoff's second law:
Kirchhoff's second law, also known as Kirchhoff's loop rule or Kirchhoff's voltage law, states that the algebraic sum of the potential differences in any closed loop or mesh in a network is zero. This law is based on the principle of energy conservation, as it ensures that no energy is gained or lost within a closed loop. Therefore, statement (b) is true.
Wheatstone bridge:
A Wheatstone bridge is a circuit arrangement used to measure unknown resistances by comparing them with known resistances. It consists of four resistances connected in the form of a diamond shape, with a galvanometer and a power source connected in opposite corners. When the resistances are balanced, the potential difference across the galvanometer becomes zero, indicating that the bridge is in equilibrium. The sensitivity of a Wheatstone bridge depends on the ratio of the resistances involved. When all four resistances are of the same order of magnitude, the bridge becomes most sensitive. Therefore, statement (c) is true.
Effect of exchanging the cell and galvanometer:
In a balanced Wheatstone bridge, the null point is achieved when the ratio of the known resistances is equal to the ratio of the unknown resistances. If the cell and galvanometer are exchanged, the bridge is no longer in equilibrium because the ratio of resistances has changed. This causes a disturbance in the null point, and the galvanometer will show a deflection indicating an imbalance in the bridge. Therefore, statement (d) is false.
In conclusion:
The false statement among the given options is (d), which states that in a balanced Wheatstone bridge, if the cell and the galvanometer are exchanged, the null point is disturbed. In reality, the null point is disturbed when the cell and galvanometer are exchanged.
A rheostat is a variable resistor that can be used in a circuit to control the flow of electric current. It can be connected in series with a load to vary the potential difference across the load. By adjusting the position of the sliding contact on the rheostat, we can change the resistance and hence the potential difference. Therefore, statement (a) is true.
Kirchhoff's second law:
Kirchhoff's second law, also known as Kirchhoff's loop rule or Kirchhoff's voltage law, states that the algebraic sum of the potential differences in any closed loop or mesh in a network is zero. This law is based on the principle of energy conservation, as it ensures that no energy is gained or lost within a closed loop. Therefore, statement (b) is true.
Wheatstone bridge:
A Wheatstone bridge is a circuit arrangement used to measure unknown resistances by comparing them with known resistances. It consists of four resistances connected in the form of a diamond shape, with a galvanometer and a power source connected in opposite corners. When the resistances are balanced, the potential difference across the galvanometer becomes zero, indicating that the bridge is in equilibrium. The sensitivity of a Wheatstone bridge depends on the ratio of the resistances involved. When all four resistances are of the same order of magnitude, the bridge becomes most sensitive. Therefore, statement (c) is true.
Effect of exchanging the cell and galvanometer:
In a balanced Wheatstone bridge, the null point is achieved when the ratio of the known resistances is equal to the ratio of the unknown resistances. If the cell and galvanometer are exchanged, the bridge is no longer in equilibrium because the ratio of resistances has changed. This causes a disturbance in the null point, and the galvanometer will show a deflection indicating an imbalance in the bridge. Therefore, statement (d) is false.
In conclusion:
The false statement among the given options is (d), which states that in a balanced Wheatstone bridge, if the cell and the galvanometer are exchanged, the null point is disturbed. In reality, the null point is disturbed when the cell and galvanometer are exchanged.
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Which of the following statements is false ?a)A rheostat can be used a...
D) point is clearly described in NCERT. SO please refer through it the chapter is electrical current and circuit . I THINK IT IS AN EXAMPLE
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Which of the following statements is false ?a)A rheostat can be used as a potential dividerb)Kirchhoff's second law represents energy conservationc)Wheatstone bridge is the most sensitive when all the four resistances are of the same order of magnitude.d)In a balanced wheatstone bridge if the cell and the galvanometer are exchanged, the null point is disturbed.Correct answer is option 'D'. Can you explain this answer?
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Which of the following statements is false ?a)A rheostat can be used as a potential dividerb)Kirchhoff's second law represents energy conservationc)Wheatstone bridge is the most sensitive when all the four resistances are of the same order of magnitude.d)In a balanced wheatstone bridge if the cell and the galvanometer are exchanged, the null point is disturbed.Correct answer is option 'D'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about Which of the following statements is false ?a)A rheostat can be used as a potential dividerb)Kirchhoff's second law represents energy conservationc)Wheatstone bridge is the most sensitive when all the four resistances are of the same order of magnitude.d)In a balanced wheatstone bridge if the cell and the galvanometer are exchanged, the null point is disturbed.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements is false ?a)A rheostat can be used as a potential dividerb)Kirchhoff's second law represents energy conservationc)Wheatstone bridge is the most sensitive when all the four resistances are of the same order of magnitude.d)In a balanced wheatstone bridge if the cell and the galvanometer are exchanged, the null point is disturbed.Correct answer is option 'D'. Can you explain this answer?.
Which of the following statements is false ?a)A rheostat can be used as a potential dividerb)Kirchhoff's second law represents energy conservationc)Wheatstone bridge is the most sensitive when all the four resistances are of the same order of magnitude.d)In a balanced wheatstone bridge if the cell and the galvanometer are exchanged, the null point is disturbed.Correct answer is option 'D'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about Which of the following statements is false ?a)A rheostat can be used as a potential dividerb)Kirchhoff's second law represents energy conservationc)Wheatstone bridge is the most sensitive when all the four resistances are of the same order of magnitude.d)In a balanced wheatstone bridge if the cell and the galvanometer are exchanged, the null point is disturbed.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements is false ?a)A rheostat can be used as a potential dividerb)Kirchhoff's second law represents energy conservationc)Wheatstone bridge is the most sensitive when all the four resistances are of the same order of magnitude.d)In a balanced wheatstone bridge if the cell and the galvanometer are exchanged, the null point is disturbed.Correct answer is option 'D'. Can you explain this answer?.
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