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A bulb and a capacitor are connected in ...

A bulb and a capacitor are connected in series to an a.c. source of varialbe frequency. How will the brightness of the bulb change on increasing the frequency of a.c. source ?

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As the frequency of the `a.c.` source increase, the capacitive reactance decrease `(X_(C) prop 1//f)` So the bulb glows with more brightness.
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RESONANCE-ALTERNATING CURRENT-Exercise -3 Part-3
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  3. What do you mean by power factor? On what factors does it depend?

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  4. An alternating voltage of frequency f is applied across a series LCR c...

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  5. What do you mean by the impedance of LCR-circuit

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  6. Distinguish between the term's average value and rmsvalue of an altern...

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  7. Explain with the help of a labelled diagram the underlying principal a...

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  8. Given below are two electric circuits A and B Calculate the ratio of...

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  9. In a series LCR circuit, the voltages across an inductor, a capacitor ...

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  10. Calculate current drawn by primary coil of a transformer, Which steps ...

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  11. Explain the term 'inductive reactance'.Show graphically the variation ...

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  12. Explain the term 'capacitive reactance'.Show graphically the variation...

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  13. Derive an expression for the impedance of an a.c. circuit consisting...

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  14. An inductor 200 mH, capactior 500 mu F, resistor 10 ohm are connected ...

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  15. The instantaneous current and voltage of an a.c. circuit are given by ...

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  16. A coil Q is connected to low voltage bulb B and placed near another co...

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  17. A series LCR circuit is connected to a source having voltage v=v(m) si...

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  18. In a series LCR circuit connected to an ac source of variable frequenc...

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  19. In an alternating circuit applied voltage is 200V, if R=8W X(L)=X(C)=6...

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  20. Draw phase diagram for a series LCR circuit with alternating voltage s...

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