JEE Mains · Physics · STD 12 - 1. Electric charges and fields
\(C_1\) and \(C_2\) are two hollow concentric cubes enclosing charges \(2 Q\) and \(3 Q\) respectively as shown in figure. The ratio of electric flux passing through \(C_1\) and \(C_2\) is _______.
- A \(2: 5\)
- B \(5: 2\)
- C \(2: 3\)
- D \(3: 2\)
Answer & Solution
Correct Answer
(A) \(2: 5\)
Step-by-step Solution
Detailed explanation
Flux through \(C_1, \phi_1=\frac{q_{\text {in }}}{\varepsilon_0}=\frac{2 Q}{\varepsilon_0}\) Flux through \(C_2, \phi_2=\frac{q_{\text {in }}}{\varepsilon_0}=\frac{2 Q+3 Q}{\varepsilon_0}=\frac{5 Q}{\varepsilon_0}\)…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- If \(R , X _{ L }\). and \(X _{ C }\) represent resistance, inductive reactance and capacitive reactance. Then which of the following is dimensionless:JEE Mains 2023 Easy
- The electric field of a plane electromagnetic wave propagating along the \(x\) direction in vacuum is \(\overrightarrow{ E }= E _{0} \hat{ j } \cos (\omega t - kx )\). The magnetic field \(\overrightarrow{ B },\) at the moment \(t =0\) is :JEE Mains 2020 Hard
- The rms speed of oxygen molecule in a vessel at particular temperature is \(\left(1+\frac{5}{x}\right)^{\frac{1}{2}} v\), where \(v\) is the average speed of the molecule. The value of \(x\) will be:(Take \(\pi=\frac{22}{7}\) )JEE Mains 2023 Medium
- Two small equal point charges of magnitude \(q\) are suspended from a common point on the ceiling by insulating mass less strings of equal lengths. They come to equilibrium with each string making angle \(\theta \) from the vertical. If the mass of each charge is \(m,\) then the electrostatic potential at the centre of line joining them will be \(\left( {\frac{1}{{4\pi { \in _0}}} = k} \right).\)JEE Mains 2013 Hard
- \(\mathrm{N}\) moles of a polyatomic gas \((f=6)\) must be mixed with two moles of a monoatomic gas so that the mixture behaves as a diatomic gas. The value of \(\mathrm{N}\) is _______.JEE Mains 2024 Hard
- An electron accelerated through a potential difference \(V_1\) has a de-Broglie wavelength of \(\lambda\). When the potential is changed to \(V _2\), its de-Broglie wavelength increases by \(50 \%\). The value of \(\left(\frac{ V _1}{ V _2}\right)\) is equal to :JEE Mains 2023 Medium
More PYQs from JEE Mains
- If \(\beta \) is one of the angles between the normals to the ellipse, \(x^2 + 3y^2 = 9\) at the points \(\left( {3\cos \theta ,\sqrt {3\,} \sin \theta } \right)\) and \(\left( { - 3\sin \,\theta ,\sqrt 3 \,\cos \theta } \right); \in \left( {0,\frac{\pi }{2}} \right)\); then \(\frac{{2\,\cot \beta }}{{\sin \,2\theta }}\) is equal toJEE Mains 2018 Hard
- Let \(\mathrm{n}>2\) be an integer. Suppose that there are \(n\) Metro stations in a city located along a circular path. Each pair of stations is connected by a straight track only. Further, each pair of nearest stations is connected by blue line, whereas all remaining pairs of stations are connected by red line. If the number of red lines is \(99\) times the number of blue lines, then the value of \(n\) isJEE Mains 2020 Medium
- Let \( S=\frac{1}{25!}+\frac{1}{3!23!}+\frac{1}{5!21!}+. \dots \) up to 13 terms. If \( 13S=\frac{2^{k}}{n!} \) where \( k\in N \), then \( n+k \) is equal toJEE Mains 2026 Easy
- \(\mathop {\lim }\limits_{n \to \infty } {\left( {\frac{{\left( {n + 1} \right)\left( {n + 2} \right) \ldots .\;3n}}{{{n^{2n}}}}} \right)^{\frac{1}{n}}} = \)JEE Mains 2016 Hard
- The amplitude of magnetic field in an electromagnetic wave propagating along \(y\)-axis is \(6.0 \times 10^{-7}\,T\). The maximum value of electric field in the electromagnetic wave is:JEE Mains 2023 Easy
- A block is fastened to a horizontal spring. The block is pulled to a distance \(x =10\,cm\) from its equilibrium position (at \(x =0\) ) on a frictionless surface from rest. The energy of the block at \(x =5\) \(cm\) is \(0.25\,J\). The spring constant of the spring is \(.........Nm ^{-1}\)JEE Mains 2023 Medium