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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: An electric lamp connected in series with a variable capacitor and ac source, its brightness increases with increase in capacitance.
Reason: Capacitive reactance decrease with increase in capacitance of capacitor.
- a)If both assertion and reason are true and the reason is the correct explanation of the assertion.
- b)If both assertion and reason are true but reason is not the correct explanation of the assertion.
- c)If assertion is true but reason is false.
- d)If the assertion and reason both are false.
Correct answer is option 'A'. Can you explain this answer?
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Directions : In the following questions, A statement of Assertion (A)...
Capacitive reactance XC = 1/ωC When capacitance increases, the capacitive reactance decreases. Due to decrease in its values, the current in the circuit will increases
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and hence brightness of source (or electric lamp) will also increases.
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Directions : In the following questions, A statement of Assertion (A)...
Assertion: An electric lamp connected in series with a variable capacitor and ac source, its brightness increases with an increase in capacitance.
Reason: Capacitive reactance decreases with an increase in capacitance of the capacitor.
Explanation:
When an electric lamp is connected in series with a variable capacitor and an AC source, the brightness of the lamp depends on the current flowing through it. The current passing through the circuit is determined by the impedance of the circuit, which includes the resistance of the lamp and the reactance of the capacitor.
Capacitive Reactance:
Capacitive reactance is the opposition to the flow of alternating current caused by the capacitor in the circuit. It is given by the formula Xc = 1/(2πfC), where Xc is the capacitive reactance, f is the frequency of the AC source, and C is the capacitance of the capacitor.
Increase in Capacitance:
When the capacitance of the variable capacitor is increased, the capacitive reactance decreases. This means that the opposition to the flow of current caused by the capacitor decreases. As a result, more current flows through the circuit, including the electric lamp.
Effect on Brightness:
As more current flows through the circuit, the brightness of the electric lamp increases. This is because the lamp's brightness is directly proportional to the current passing through it. Therefore, when the capacitance is increased, the brightness of the lamp also increases.
Conclusion:
From the above explanation, it is clear that both the assertion and the reason are true. The reason correctly explains why the brightness of the lamp increases with an increase in the capacitance of the variable capacitor. Therefore, the correct answer is option A.
Reason: Capacitive reactance decreases with an increase in capacitance of the capacitor.
Explanation:
When an electric lamp is connected in series with a variable capacitor and an AC source, the brightness of the lamp depends on the current flowing through it. The current passing through the circuit is determined by the impedance of the circuit, which includes the resistance of the lamp and the reactance of the capacitor.
Capacitive Reactance:
Capacitive reactance is the opposition to the flow of alternating current caused by the capacitor in the circuit. It is given by the formula Xc = 1/(2πfC), where Xc is the capacitive reactance, f is the frequency of the AC source, and C is the capacitance of the capacitor.
Increase in Capacitance:
When the capacitance of the variable capacitor is increased, the capacitive reactance decreases. This means that the opposition to the flow of current caused by the capacitor decreases. As a result, more current flows through the circuit, including the electric lamp.
Effect on Brightness:
As more current flows through the circuit, the brightness of the electric lamp increases. This is because the lamp's brightness is directly proportional to the current passing through it. Therefore, when the capacitance is increased, the brightness of the lamp also increases.
Conclusion:
From the above explanation, it is clear that both the assertion and the reason are true. The reason correctly explains why the brightness of the lamp increases with an increase in the capacitance of the variable capacitor. Therefore, the correct answer is option A.
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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: An electric lamp connected in series with a variable capacitor and ac source, its brightness increases with increase in capacitance.Reason: Capacitive reactance decrease with increase in capacitance of capacitor.a)If both assertion and reason are true and the reason is the correct explanation of the assertion.b)If both assertion and reason are true but reason is not the correct explanation of the assertion.c)If assertion is true but reason is false.d)If the assertion and reason both are false.Correct answer is option 'A'. 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: An electric lamp connected in series with a variable capacitor and ac source, its brightness increases with increase in capacitance.Reason: Capacitive reactance decrease with increase in capacitance of capacitor.a)If both assertion and reason are true and the reason is the correct explanation of the assertion.b)If both assertion and reason are true but reason is not the correct explanation of the assertion.c)If assertion is true but reason is false.d)If the assertion and reason both are false.Correct answer is option 'A'. 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: An electric lamp connected in series with a variable capacitor and ac source, its brightness increases with increase in capacitance.Reason: Capacitive reactance decrease with increase in capacitance of capacitor.a)If both assertion and reason are true and the reason is the correct explanation of the assertion.b)If both assertion and reason are true but reason is not the correct explanation of the assertion.c)If assertion is true but reason is false.d)If the assertion and reason both are false.Correct answer is option 'A'. 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: An electric lamp connected in series with a variable capacitor and ac source, its brightness increases with increase in capacitance.Reason: Capacitive reactance decrease with increase in capacitance of capacitor.a)If both assertion and reason are true and the reason is the correct explanation of the assertion.b)If both assertion and reason are true but reason is not the correct explanation of the assertion.c)If assertion is true but reason is false.d)If the assertion and reason both are false.Correct answer is option 'A'. 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: An electric lamp connected in series with a variable capacitor and ac source, its brightness increases with increase in capacitance.Reason: Capacitive reactance decrease with increase in capacitance of capacitor.a)If both assertion and reason are true and the reason is the correct explanation of the assertion.b)If both assertion and reason are true but reason is not the correct explanation of the assertion.c)If assertion is true but reason is false.d)If the assertion and reason both are false.Correct answer is option 'A'. 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: An electric lamp connected in series with a variable capacitor and ac source, its brightness increases with increase in capacitance.Reason: Capacitive reactance decrease with increase in capacitance of capacitor.a)If both assertion and reason are true and the reason is the correct explanation of the assertion.b)If both assertion and reason are true but reason is not the correct explanation of the assertion.c)If assertion is true but reason is false.d)If the assertion and reason both are false.Correct answer is option 'A'. 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: An electric lamp connected in series with a variable capacitor and ac source, its brightness increases with increase in capacitance.Reason: Capacitive reactance decrease with increase in capacitance of capacitor.a)If both assertion and reason are true and the reason is the correct explanation of the assertion.b)If both assertion and reason are true but reason is not the correct explanation of the assertion.c)If assertion is true but reason is false.d)If the assertion and reason both are false.Correct answer is option 'A'. 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: An electric lamp connected in series with a variable capacitor and ac source, its brightness increases with increase in capacitance.Reason: Capacitive reactance decrease with increase in capacitance of capacitor.a)If both assertion and reason are true and the reason is the correct explanation of the assertion.b)If both assertion and reason are true but reason is not the correct explanation of the assertion.c)If assertion is true but reason is false.d)If the assertion and reason both are false.Correct answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12.
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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: An electric lamp connected in series with a variable capacitor and ac source, its brightness increases with increase in capacitance.Reason: Capacitive reactance decrease with increase in capacitance of capacitor.a)If both assertion and reason are true and the reason is the correct explanation of the assertion.b)If both assertion and reason are true but reason is not the correct explanation of the assertion.c)If assertion is true but reason is false.d)If the assertion and reason both are false.Correct answer is option 'A'. Can you explain this answer? tests, examples and also practice Class 12 tests.
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