Home/Class 12/Physics/

Question and Answer

A \(15\) micro Farad capacitor is connected to a \(220\text{V}, 50\text{Hz} \)source Find the capacitive reactance and current \((\)rms and peak\()\) in circuit. If the frequency is doubled what happens to the capacitive reactance and current.

Answer

The capacitive reactance \(=\frac 1{2\mathit{\pi fC}}\)
Here \(f=50\mathit{Hz}\) and \(C=15\) micro farad
So capacitive reactance \(=212\) ohm
Rms current= \(\frac V{\mathit{reactance}}=\frac{220}{212}=1.03A\)
Peak current \(=\sqrt2I=1.414\times 1.03=1.47A\)
When the frequency is doubled the capacitive reactance will be halved than the current will also be doubled.
To Keep Reading This Answer, Download the App
4.6
star pngstar pngstar pngstar pngstar png
Review from Google Play
To Keep Reading This Answer, Download the App
4.6
star pngstar pngstar pngstar pngstar png
Review from Google Play
Correct22
Incorrect0
Watch More Related Solutions
The angle between \(\overrightarrow {A}\) and \(\overrightarrow {B}\) is \(60^{\circ }\) . What is the ratio of \(\overrightarrow {A}.\overrightarrow {B}\) and \(|\overrightarrow {A}\times \overrightarrow {B}|\) ?
A sinusoidal voltage of peak value \(283\;\text{V}\) and frequency \(50\; \text{Hz}\) is applied to a series LCR circuit in which \(R=3\; \Omega\), \(L=25.48\;mH\; \text{and}\; C=796\; \mu F\). Find the impedance.
For the reversible reaction, \(N_{2}(g)+3H_{2}(g)\rightleftharpoons 2NH_{3}(g)\) at \(500^{\circ }C\), the value of \(K_{p}\) is \(1.44\times 10^{-5}\) when  partial pressure is measured in atmosphere. The corresponding value of \(K_{c}\) with concentration in \(mol/L\) is  ( ).
A. \(\frac {1.44\times 10^{-5}}{(0.082\times 500)^{-2}}\) 
B.  \(\frac {1.44\times 10^{-5}}{(8.314\times 773)^{-2}}\)
C.  \(\frac {1.44\times 10^{-5}}{(0.082\times 773)^{2}}\) 
D.  \(\frac {1.44\times 10^{-5}}{(0.082\times 773)^{-2}}\)
Find the energy, the frequency and the momentum of an X-ray photon of wavelength \(0.10\; nm\).
In the following question a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.
Assertion: \( p\) -nitrophenol is more acidic than phenol.
Reason : Nitro group helps in the stabilisation of the phenoxide ion by dispersal of negative charge due to resonance.
Show that path of a projectile fired horizontally is parabolic in nature.
In the reaction of oxalate with permanganate in acidic medium, the number of electrons involved in producing onemolecule of \(CO_{2}\) is ( )
A. 2
B. 5
C. 1
D. 10
Can a particle have acceleration at an instant if its velocity is zero at that instant ? Give example.
A sinusoidal voltage of peak voltage \(283\;V\)  and frequency \(50\;\mathit{hz}\)  is applied to a series LCR circuit in which \(R=3\;\Omega ,L=25.48\;\mathit{mH}\)  and \(C=796\)  micro farad. Find the phase difference between the voltage across the source and current.
Three particles, each having a charge of \( 10\mu\;C\), are placed at the vertices of an equilateral triangle of side 10 cm. Find the work done by a person in pulling them apart to infinite separations.

Load More