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The frequency of an ac supply is doubled...

The frequency of an ac supply is doubled, what happens to inductive reactance `X_L` and capacitive reactance `X_c` ?

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The frequency of a.c. is doubled, what happens to inductive reactance?

The frequency of a.c. is doubled, what happens to capacitive reactance?

What is capacitive reactance?

What is physical significance of inductance reactance or capacitive reactance?

Direction. In the follwing questions, a statement of assertion is followed by a statement of reason. While answering a question, you are required to choose the correct are out of the given four responses and mark it as (A). If both assertion and reason are true and reason is the correct explanation of the assertion, (B) if both assertion and reason are true but reason is not correct explanation of the assertion. (C) if asssertion is true, but reason if false, (D) if both assertion and reason are false Assertion : In series LCR-circuits, the resonance occurs at one frequency only. Reason : At resonance, the inductive reactance is equal and opposite to the capacitve reactance.

Distinguish between resistance, inductive reactance, capacitive reactance and impedance.

Direction. In the follwing questions, a statement of assertion is followed by a statement of reason. While answering a question, you are required to choose the correct are out of the given four responses and mark it as (A). If both assertion and reason are true and reason is the correct explanation of the assertion, (B) if both assertion and reason are true but reason is not correct explanation of the assertion. (C) if asssertion is true, but reason if false, (D) if both assertion and reason are false Assertion : At resonance, the inductive reactance equal and opposite to the capacitive reactance. Reason : In series LCR-circuit, the inductive reactance is equal and opposite to the capacitive reactance.

PUNJAB BOARD PREVIOUS YEAR PAPERS-ALTERNATING CURRENTS-EXERSICE
  1. Which is more dangerous in use :a.c or d.c. ? Explain, why

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  2. Define root mean square value of an alternating current.

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  3. The frequency of an ac supply is doubled, what happens to inductive re...

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  4. How does capacitive reactance Xc of a capacitor vary in an a.c. and d....

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  5. How does inductive reactance.XL of an inductor vary in d.c.and high fr...

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  6. Define root mean square value of an alternating current.

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  7. Derive an our expressionforthe Power of an L.C.R.alternating current c...

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  8. Derive the relation for mean or average value of alternating current.

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  9. An alternating e.m.f is supplied through apure inductance. Investigate...

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  10. Derive an expression for average power in an LCR a.c. circuit.

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  11. Prove mathematically that the average value of alternating current ove...

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  12. Derive the expression for the impedance of an a.c. circuit with an ind...

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  13. Define root mean square value of an alternating current.

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  14. What do you mean by the average value of a.c. ? Derive the expression ...

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  15. Define root mean square value of an alternating current.

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  16. With the help of phasor diagram derive an expression for impedance in ...

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  17. Using phasor diagram, derive an expression for impedance of an a.c. ci...

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  18. Define root mean square value of an alternating current.

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  19. Derive a relation for the average power of an alternating current circ...

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  20. Derive an expression for average power of an AC (alternating current) ...

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