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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: The alternating current lags behind the e.m.f. by a phase angle of π/2, when ac flows through an inductor.
Reason: The inductive reactance increases as the frequency of ac source decreases.
- 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 'C'. Can you explain this answer?
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Directions : In the following questions, A statement of Assertion (A)...
When ac flows through an inductor current lags behind the emf., by phase of p/2, inductive reactance, XL=ωL=π.2f.L, so when frequency increases correspondingly inductive reactance also increases.
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Directions : In the following questions, A statement of Assertion (A)...
Assertion: The alternating current lags behind the e.m.f. by a phase angle of π/2, when ac flows through an inductor.
Reason: The inductive reactance increases as the frequency of ac source decreases.
Explanation:
To understand the relationship between the current and e.m.f in an inductor, we need to consider the behavior of inductors in AC circuits.
AC Circuits and Inductors:
In an AC circuit, the current and voltage vary sinusoidally with time. The voltage across an inductor is given by the equation:
V = Vm sin(ωt)
The current through an inductor is given by the equation:
I = Im sin(ωt + φ)
Where:
- V is the instantaneous voltage across the inductor
- Vm is the maximum voltage across the inductor
- ω is the angular frequency of the AC source
- t is the time
- I is the instantaneous current through the inductor
- Im is the maximum current through the inductor
- φ is the phase angle between the voltage and current
Phase Angle:
The phase angle represents the time difference between the voltage and current waveforms. It determines whether the current leads or lags the voltage.
Explanation of Assertion:
The assertion states that the alternating current lags behind the e.m.f. by a phase angle of π/2 when AC flows through an inductor. This is true because of the behavior of inductors in AC circuits.
Explanation of Reason:
The reason states that the inductive reactance increases as the frequency of the AC source decreases. This is also true.
Inductive Reactance:
Inductive reactance (XL) is a measure of the opposition to the flow of AC current in an inductor. It is given by the equation:
XL = 2πfL
Where:
- XL is the inductive reactance
- f is the frequency of the AC source
- L is the inductance of the inductor
Relation between Inductive Reactance and Frequency:
As the frequency of the AC source decreases, the inductive reactance increases. This is because the inductive reactance is directly proportional to the frequency. Therefore, as the frequency decreases, the opposition to the flow of current in the inductor increases.
Conclusion:
From the explanation above, we can conclude that the assertion is true (the alternating current lags behind the e.m.f. by a phase angle of π/2 when AC flows through an inductor) and the reason is false (the inductive reactance increases as the frequency of the AC source decreases). Therefore, the correct answer is option 'C'.
Reason: The inductive reactance increases as the frequency of ac source decreases.
Explanation:
To understand the relationship between the current and e.m.f in an inductor, we need to consider the behavior of inductors in AC circuits.
AC Circuits and Inductors:
In an AC circuit, the current and voltage vary sinusoidally with time. The voltage across an inductor is given by the equation:
V = Vm sin(ωt)
The current through an inductor is given by the equation:
I = Im sin(ωt + φ)
Where:
- V is the instantaneous voltage across the inductor
- Vm is the maximum voltage across the inductor
- ω is the angular frequency of the AC source
- t is the time
- I is the instantaneous current through the inductor
- Im is the maximum current through the inductor
- φ is the phase angle between the voltage and current
Phase Angle:
The phase angle represents the time difference between the voltage and current waveforms. It determines whether the current leads or lags the voltage.
Explanation of Assertion:
The assertion states that the alternating current lags behind the e.m.f. by a phase angle of π/2 when AC flows through an inductor. This is true because of the behavior of inductors in AC circuits.
Explanation of Reason:
The reason states that the inductive reactance increases as the frequency of the AC source decreases. This is also true.
Inductive Reactance:
Inductive reactance (XL) is a measure of the opposition to the flow of AC current in an inductor. It is given by the equation:
XL = 2πfL
Where:
- XL is the inductive reactance
- f is the frequency of the AC source
- L is the inductance of the inductor
Relation between Inductive Reactance and Frequency:
As the frequency of the AC source decreases, the inductive reactance increases. This is because the inductive reactance is directly proportional to the frequency. Therefore, as the frequency decreases, the opposition to the flow of current in the inductor increases.
Conclusion:
From the explanation above, we can conclude that the assertion is true (the alternating current lags behind the e.m.f. by a phase angle of π/2 when AC flows through an inductor) and the reason is false (the inductive reactance increases as the frequency of the AC source decreases). Therefore, the correct answer is option 'C'.
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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: The alternating current lags behind the e.m.f. by a phase angle of π/2, when ac flows through an inductor.Reason: The inductive reactance increases as the frequency of ac source decreases.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 'C'. 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: The alternating current lags behind the e.m.f. by a phase angle of π/2, when ac flows through an inductor.Reason: The inductive reactance increases as the frequency of ac source decreases.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 '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 : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion: The alternating current lags behind the e.m.f. by a phase angle of π/2, when ac flows through an inductor.Reason: The inductive reactance increases as the frequency of ac source decreases.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 '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 : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion: The alternating current lags behind the e.m.f. by a phase angle of π/2, when ac flows through an inductor.Reason: The inductive reactance increases as the frequency of ac source decreases.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 'C'. 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: The alternating current lags behind the e.m.f. by a phase angle of π/2, when ac flows through an inductor.Reason: The inductive reactance increases as the frequency of ac source decreases.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 '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 : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion: The alternating current lags behind the e.m.f. by a phase angle of π/2, when ac flows through an inductor.Reason: The inductive reactance increases as the frequency of ac source decreases.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 '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 : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.Assertion: The alternating current lags behind the e.m.f. by a phase angle of π/2, when ac flows through an inductor.Reason: The inductive reactance increases as the frequency of ac source decreases.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 'C'. 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: The alternating current lags behind the e.m.f. by a phase angle of π/2, when ac flows through an inductor.Reason: The inductive reactance increases as the frequency of ac source decreases.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 'C'. 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: The alternating current lags behind the e.m.f. by a phase angle of π/2, when ac flows through an inductor.Reason: The inductive reactance increases as the frequency of ac source decreases.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 'C'. 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: The alternating current lags behind the e.m.f. by a phase angle of π/2, when ac flows through an inductor.Reason: The inductive reactance increases as the frequency of ac source decreases.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 'C'. 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: The alternating current lags behind the e.m.f. by a phase angle of π/2, when ac flows through an inductor.Reason: The inductive reactance increases as the frequency of ac source decreases.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 'C'. 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: The alternating current lags behind the e.m.f. by a phase angle of π/2, when ac flows through an inductor.Reason: The inductive reactance increases as the frequency of ac source decreases.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 'C'. 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: The alternating current lags behind the e.m.f. by a phase angle of π/2, when ac flows through an inductor.Reason: The inductive reactance increases as the frequency of ac source decreases.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 'C'. Can you explain this answer? tests, examples and also practice Class 12 tests.
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