AP EAMCET · PHYSICS · Electrostatics
Three infinitely long charged sheets are placed as shown in the figure. The electric force acting on a charge \(-q\) placed at the point \(P\) is \(\left(\sigma=\right.\) surface charge density, \(\varepsilon_0=\) permittivity of the free space)
- A \(+\frac{2 \sigma}{\varepsilon_0} \hat{\mathbf{k}}\)
- B \(-\frac{2 \sigma}{\varepsilon_0} \hat{\mathbf{k}}\)
- C \(+\frac{4 \sigma}{\varepsilon_0} \hat{\mathbf{k}}\)
- D \(-\frac{4 \sigma}{\varepsilon_0} \hat{\mathbf{k}}\)
Answer & Solution
Correct Answer
(B) \(-\frac{2 \sigma}{\varepsilon_0} \hat{\mathbf{k}}\)
Step-by-step Solution
Detailed explanation
According to the question, Given, surface charge density \(=\sigma\) permittivity of the free space \(=\varepsilon_0\) Now, the electric force acting on a charge \(-q\) at a place the point \(P\),…
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
- Two electric dipoles of moments \(p\) and \(27 p\) are placed in opposite direction on a line at a distance of \(24 \mathrm{~cm}\). The electric field will be zero at a point between the dipoles whose distance from the dipole of moment \(p\) isAP EAMCET 2021 Medium
- Two bodies of masses \(m_1\) and \(m_2\) initially at rest at infinite distance apart move towards each other under gravitational force of attraction. Their relative velocity of approach when they are separated by a distance \(r\) is ( \(\mathrm{G}=\) universal gravitational constant.)AP EAMCET 2019 Medium
- The excess pressure inside a spherical soap bubble of radius \(1 \mathrm{~cm}\) is balanced by a column of oil (Specific gravity \(=0.8\) ), \(2 \mathrm{~mm}\) high , the surface tension of the bubble isAP EAMCET 2010 Easy
- Two wires \(A\) and \(B\) of same cross-section are connected end to end. When same tension is created in both wires, the elognation in \(B\) wire is twice the elongation in \(A\) wire. If \(L_A\) and \(L_B\) are the initial lengths of the wires \(A\) and \(B\) respectively, then
(Young's modulus of material of wire \(A=2 \times 10^{11} \mathrm{Nm}^{-2}\) and Young's modulus of material of wire \(B=1.1 \times 10^{11} \mathrm{Nm}^{-2}\) ).AP EAMCET 2022 Easy - Match the measurements given in List I with the number of significant figures given in List II.
\(\begin{array}{lll}
\hline & \text{ List I } & \text{ List II } \\
\hline (A) & 74.083 & I. 3 \\
\hline (B) & 0.029 & II. 4 \\
\hline (C) & 0.002407 & III. 2 \\
\hline (D) & 2.74 \times 10^7 & IV. 5 \\
\hline
\end{array}\)
The correct answer is
A B C DAP EAMCET 2018 Easy - A large tank filled with water to a height \(h\) is to be emptied through a small hole at the bottom. The ratio of times taken for the level of water to fall from \(h\) to \(h / 2\) and \(h / 2\) to zero isAP EAMCET 2003 Medium
More PYQs from AP EAMCET
- solution of urea is isotonic with solution of a non-volatile solute of molar mass . The value of isAP EAMCET 2022 Hard
- A black body of mass \(34.38 \mathrm{~g}\) and surface area \(19.2 \mathrm{~cm}^2\) is at an initial temperature of \(400 \mathrm{~K}\). It is allowed to cool inside an evacuated enclosure kept at constant temperature \(300 \mathrm{~K}\). The rate of cooling is \(0.04^{\circ} \mathrm{C}\) per second. The specific heat of the body in \(\mathrm{J} \mathrm{kg}^{-1} \mathrm{~K}^{-1}\) is
(Stefan's constant \(\sigma=5.73 \times 10^{-8} \mathrm{Wm}^{-2} \mathrm{~K}^{-4}\)AP EAMCET 2004 Easy - The angle between the lines joining the origin to the points of intersection of \(x+2 y+1=0\) and \(2 x^2-2 x y+3 y^2+2 x-y-1=0\) isAP EAMCET 2017 Easy
- The number of real values of \(m\) so that the equation \(x^2+(2 m+1) x+m=0\) has equal roots isAP EAMCET 2022 Easy
- A particle of mass \(2.2 \times 10^{-30} \mathrm{~kg}\) and charge \(1.6 \times 10^{-19} \mathrm{C}\) is moving at a speed of \(10 \mathrm{~km} \mathrm{~s}^{-1}\) in a circular path of radius \(2.8 \mathrm{~cm}\) inside a solenoid. The solenoid has \(25 \frac{\text { turns }}{\mathrm{cm}}\) and its magnetic field is perpendicular to the plane of the particle's path. The current in the solenoid is
\(\left(\right.\) Take, \(\mu_0=4 \pi \times 10^{-7} \mathrm{Hm}^{-1}\) )AP EAMCET 2022 Medium - If \(\alpha, \beta\) are the irrational roots of the equation \(x^5-5 x^4+9 x^3-9 x^2+5 x-1=0\), then the roots of the equation \((\alpha+\beta) x^2+2 \alpha \beta x-\alpha \beta=0\) areAP EAMCET 2018 Medium