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An eletric lamp connected in series with...

An eletric lamp connected in series with a capacitor and an a.c. source is glowing with certain brightness. How does the brighness of the lamp change on reducing the capacitance ?

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To solve the problem of how the brightness of an electric lamp changes when the capacitance in a series circuit with an AC source is reduced, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding the Circuit**: - We have an electric lamp (which acts as a resistive load) connected in series with a capacitor and an AC voltage source. The brightness of the lamp depends on the current flowing through it. 2. **Brightness and Current Relationship**: ...
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Knowledge Check

  • Assertion: An electric lamp connected in series with a variable capacitor and AC source, its brightness increases with increases in capacitance. Reason: Capacitive reactance decrease with increases in capacitance of capacitor.

    A
    If both the assertion and reason are true and reason is a true explantion of the assertion.
    B
    If both the assertion and reason are true but the reason is not true the correct explantion of the assertion.
    C
    If the assertion is true but reason false
    D
    If both the assertion and reason are false.

  • An electric bulb and a capacitor are connected in series with an AC source.On increasing the freqency of the source, the brightness of the bulb

    A
    increase
    B
    decrease
    C
    remains uncharged
    D
    sometime increases and sometimes decreases

  • A lamp is connected is series with a a capacitor and an AC source, what happens if the capacity of the capacitor is reduced ?

    A
    The lamp shines more brightly
    B
    The lamp shines less brightly
    C
    There is no change in the brightness of the lamp
    D
    Birghtness may increase or decrease depending on the frequency of the AC

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    Explore conceptually related problems

    (i) When an AC source is connected to an ideal inductor show that the average power supplied by the source ever a complete cycle is zero. (ii) A lamp is connected in series with an inductor and an AC source. What happens to the brightness of the lamp when the key is plugged in and an iron rod is inserted the indcutor ? Explain.

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

    An electric bulb and a capacitor ae connected in an AC source. On increasing the frequency of the brightness of the bulb:

    A capacitor ‘C’, a variable resistor ‘R’ and a bulb ‘B’ are connected in series to the ac mains in circuits as shown. The bulb glows with some brightness. How will the glow of the bulb change if the resistor R is increased keeping the same capacitance?

    Assertion (A) : A lamp is connected in series with a capacitor and ac source connected across their terminal consequently current flow in the circuit and the lamp will shine. Reason (R ) : Capacitor block dc current and allow ac current

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