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What is the reactance of a capacitor con...

What is the reactance of a capacitor connected to a constant `DC` source?

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Knowledge Check

  • A capacitor has some dielectric between its plates, and the capacitor is connected to a DC source. The battery is now disconnected and then the dielectric is removed. State whether the capacitance, the energy stored in it, electric field, charge stored and the voltage will increase ro remain constant.

    A
    capacitance will increase.
    B
    energy stored will decrease.
    C
    electric field will increase.
    D
    voltage will decrease.

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    The figure shows the graphical variation of the reactance of a capacitor with frequency of ac source. (a) find the capacitance of the capacitor (b)an ideal inductor has the same reactance at 100 Hz frequency as the capacitor has the same frequency find the value of the inductor. (c) draw the graph showing the variation of the reactance of this inductor with frequency

    A capacitor has some dielectric between its plates, and the capacitor is connected to a DC source. The battery is now disconnected and then the dielectric is removed. State whether the capacitance, the energy stored in it, electric field, charge stored and the voltage will increase ro remain constant.

    A coil of inductive reactance 31 Omega has a resistance of 8 ohm . It is placed in series with a condenser of capacitive reactance 25 Omega . The combination is connected to an ac source of 110 V . The power factor of the circuit is

    A coil of inductive reactance 31 Omega has a resistance of 8 ohm . It is placed in series with a condenser of capacitive reactance 25 Omega . The combination is connected to an ac source of 110 V . The power factor of the circuit is

    A coil of inductive reactance 31 Omega has a resistance of 8 Omega . It is placed in series with a condenser of capacitive reactance 25 Omega . The combination is connected to an ac source of 110 V . The power factor of the circuit is

    (a) What is the reactance of a 2.00 H inductor at a frequency of 50.0 Hz ? (b) What is the inductance of an inductor whose reactance is 2.00 Omega at 50.0 Hz ? (c) What is the reactance of a 2.00 muF capacitor at a frequency of 50.0 Hz ? (d) What is the capacitance of a capacitor whose reactance is 2.00 Omega at 50.0 Hz ?

    Find the reactance of a capacitor (C = 200 muF) when it is connected to (a) a 10 Hz AC source , (b) a 50 Hz AC source and ( c) a 500 Hz AC source.

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