MCQ
A capacitor of capacity $C$ has reactance $X$. If capacitance and frequency become double then reactance will be
  • A
    $2X$
  • B
    $4X$
  • C
    $X/2$
  • $X/4$

Answer

Correct option: D.
$X/4$
d
$X=\frac{1}{C \omega} \quad X^{\prime}=\frac{1}{4 C \omega}$

$X^{\prime}=\frac{X}{4}$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Which arrangement of four identical resistances should be used to draw maximum energy from a cell of voltage $V$
The magnetic field at the centre of a circular coil of radius r is π times that due to a long straight wire at a distance r from it, for equal currents. Figure here shows three cases : in all cases the circular part has radius r and straight ones are infinitely long. For same current the B field at the centre P in cases 1, 2, 3 have the ratio
A plane mirror rotating at an angular velocity of $3 \;radian/s$ reflects a light beam. The angular velocity of the reflected beam is ........ $radian/s$
A parallel plate capacitor, partially filled with a dielectric slab of dielectric constant $K$ , is connected with a cell of emf $V\ volt$ , as shown in the figure. Separation between the plates is $D$ . Then
When the speed of electrons increases, then the value of its specific charge
A ray of light travelling in air have wavelength $\lambda$, frequency $n$, velocity $v$ and intensity $I$. If this ray enters into water then these parameters are $\lambda ',\,n',\, v'$ and $I'$ respectively. Which relation is correct from following?
Which among the following cannot be the charge of a charged body?
Following figures show the arrangement of bar magnets in different configurations. Each magnet has magnetic dipole moment $\vec m$ . Which configuration has highest net magnetic dipole moment
Faraday's laws of electrolysis are related to
Image is formed for the short sighted person at