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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): Power rating of resistance is not so important when used in a circuit.
Reason (R): The resistance value changes with temperature.
- 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 'D'. Can you explain this answer?
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Most Upvoted Answer
Directions : In the following questions, A statement of Assertion (A)...
Assertion (A): Power rating of resistance is not so important when used in a circuit.
Reason (R): The resistance value changes with temperature.
The correct answer is option D, which states that Assertion (A) is false and Reason (R) is true.
Explanation:
Power rating of resistance:
The power rating of a resistance refers to the maximum power that the resistance can handle without getting damaged. It indicates the amount of heat that the resistance can dissipate safely. If the power dissipated by the resistance exceeds its power rating, it may overheat and get damaged.
Importance of power rating:
The power rating of a resistance is important in circuits where the power dissipated by the resistance is high. When a resistance is used in a circuit, the power dissipated by it can be calculated using the formula P = V^2/R, where P is the power, V is the voltage across the resistance, and R is the resistance value. If the power dissipated exceeds the power rating of the resistance, it can lead to overheating and failure of the component.
Resistance value and temperature:
The resistance value of a resistor can change with temperature. This phenomenon is known as temperature coefficient of resistance. Different materials used for resistors have different temperature coefficients. Some materials have a positive temperature coefficient, meaning that their resistance increases with an increase in temperature. Others have a negative temperature coefficient, where the resistance decreases with an increase in temperature.
Explanation of the answer:
The correct answer is option D because Assertion (A) is false and Reason (R) is true. The power rating of a resistance is indeed important when used in a circuit, especially when the power dissipated is high. If the power dissipated exceeds the power rating, the resistance can get damaged. On the other hand, the resistance value does change with temperature due to the temperature coefficient of resistance. However, this does not imply that the power rating of the resistance is not important. The power rating is still significant to ensure the safe operation of the resistance in a circuit.
Reason (R): The resistance value changes with temperature.
The correct answer is option D, which states that Assertion (A) is false and Reason (R) is true.
Explanation:
Power rating of resistance:
The power rating of a resistance refers to the maximum power that the resistance can handle without getting damaged. It indicates the amount of heat that the resistance can dissipate safely. If the power dissipated by the resistance exceeds its power rating, it may overheat and get damaged.
Importance of power rating:
The power rating of a resistance is important in circuits where the power dissipated by the resistance is high. When a resistance is used in a circuit, the power dissipated by it can be calculated using the formula P = V^2/R, where P is the power, V is the voltage across the resistance, and R is the resistance value. If the power dissipated exceeds the power rating of the resistance, it can lead to overheating and failure of the component.
Resistance value and temperature:
The resistance value of a resistor can change with temperature. This phenomenon is known as temperature coefficient of resistance. Different materials used for resistors have different temperature coefficients. Some materials have a positive temperature coefficient, meaning that their resistance increases with an increase in temperature. Others have a negative temperature coefficient, where the resistance decreases with an increase in temperature.
Explanation of the answer:
The correct answer is option D because Assertion (A) is false and Reason (R) is true. The power rating of a resistance is indeed important when used in a circuit, especially when the power dissipated is high. If the power dissipated exceeds the power rating, the resistance can get damaged. On the other hand, the resistance value does change with temperature due to the temperature coefficient of resistance. However, this does not imply that the power rating of the resistance is not important. The power rating is still significant to ensure the safe operation of the resistance in a circuit.
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Community Answer
Directions : In the following questions, A statement of Assertion (A)...
Power rating describes the heat dissipation capability of the resistor. If the heat generated is more than the power rating of the resistor, it will burn. So the assertion is false. Resistance value is temperature dependent. So, the reason is true, But reason does not explain the assertion.
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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): Power rating of resistance is not so important when used in a circuit.Reason (R): The resistance value changes with temperature.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 '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): Power rating of resistance is not so important when used in a circuit.Reason (R): The resistance value changes with temperature.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 '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): Power rating of resistance is not so important when used in a circuit.Reason (R): The resistance value changes with temperature.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 '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): Power rating of resistance is not so important when used in a circuit.Reason (R): The resistance value changes with temperature.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 '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): Power rating of resistance is not so important when used in a circuit.Reason (R): The resistance value changes with temperature.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 '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): Power rating of resistance is not so important when used in a circuit.Reason (R): The resistance value changes with temperature.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 '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): Power rating of resistance is not so important when used in a circuit.Reason (R): The resistance value changes with temperature.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 '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): Power rating of resistance is not so important when used in a circuit.Reason (R): The resistance value changes with temperature.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 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12.
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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): Power rating of resistance is not so important when used in a circuit.Reason (R): The resistance value changes with temperature.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 '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): Power rating of resistance is not so important when used in a circuit.Reason (R): The resistance value changes with temperature.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 '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): Power rating of resistance is not so important when used in a circuit.Reason (R): The resistance value changes with temperature.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 '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): Power rating of resistance is not so important when used in a circuit.Reason (R): The resistance value changes with temperature.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 'D'. Can you explain this answer? tests, examples and also practice Class 12 tests.
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