AP EAMCET · PHYSICS · Electrostatics
Electric field vector in a region is given by \(\mathbf{E}=(3 \hat{\mathbf{i}}+4 y \hat{\mathbf{j}}) \mathrm{V}-\mathrm{m}^{-1}\). The potential at the origin is zero. Then, the potential at a point \((2,1) \mathrm{m}\) is
- A 7 V
- B 8 V
- C -8 V
- D -7 V
Answer & Solution
Correct Answer
(C) -8 V
Step-by-step Solution
Detailed explanation
\begin{gathered} \text { As, } \quad E=\frac{-\partial V_x}{\partial x} \hat{\mathrm{i}}+\frac{-\partial V_y}{\partial y} \hat{\mathrm{j}} \\ \frac{-\partial V_x}{\partial x}=3 \text { and } \frac{-\partial V_y}{\partial y}=4 y \\ \Rightarrow \quad V_x=-3 x \text { and } V_y=-2…
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
- The coefficient of mutual inductance between the primary and the secondary coil of a transformer is \(0.2 \mathrm{H}\). When the current in the primary changes by \(5 \mathrm{As}^{-1}\), then the induced emf in the secondary will beAP EAMCET 2020 Hard
- The velocity and time graph for a particle moving in a straight line is shown in the figure. Then, the average velocity between \(t=4 \mathrm{~s}\) and \(\mathrm{t}=6 \mathrm{~s}\) is ____
AP EAMCET 2017 Easy - In the given circuit, if the current flowing through \(5 \Omega\) resistor is \(0.5 \mathrm{~A}\) then the value of \(\mathrm{E}\) is
AP EAMCET 2023 Hard - A particle is released from a height . At a certain height its kinetic energy is half of its potential energy with reference to the surface of the earth. Height and speed of the particle at that instant are respectivelyAP EAMCET 2018 Easy
- Two bodies having kinetic energy in the ratio , are moving with same linear velocity. The ratio of their masses isAP EAMCET 2021 Easy
- A bullet of mass \(0.02 \mathrm{~kg}\) travelling horizontally with velocity \(250 \mathrm{~ms}^{-1}\) strikes a block of wood of mass \(0.23 \mathrm{~kg}\) which rests on a rough horizontal surface. After the impact, the block and bullet move together and come to rest after travelling a distance of \(40 \mathrm{~m}\). The coefficient of sliding friction of the rough surface is \(\left(g=9.8 \mathrm{~ms}^{-2}\right)\)AP EAMCET 2009 Medium
More PYQs from AP EAMCET
- Observe the following statements
A. Integrating factor of \(\frac{d y}{d x}+y=x^2\) is \(e^x\)
R. Integrating factor of \(\frac{d y}{d x}+P(x) y=Q(x)\) is \(e^{\int P(x) d x}\)
Then, the true statement among the following isAP EAMCET 2004 Easy - If \(A=\left[\begin{array}{cc}\cos \frac{2 \pi}{33} & \sin \frac{2 \pi}{33} \\ -\sin \frac{2 \pi}{33} & \cos \frac{2 \pi}{33}\end{array}\right]\), then \(\mathrm{A}^{2017}=\)AP EAMCET 2017 Medium
- \(\int_0^3\left|x^2-3 x+2\right| d x=\)AP EAMCET 2018 Medium
- Four cards are drawn at random from a pack of playing cards. The probability of getting exactly two cards from the same suit and the remaining two cards from two different suits isAP EAMCET 2018 Medium
- The distance between the focii of the ellipse \(x=3 \cos \theta\), \(y=4 \sin \theta\) isAP EAMCET 2016 Easy
- The lines \(3 x^2+8 x y-3 y^2+2 x-4 y-1=0\) and \(4 x-3 y-2=0\)AP EAMCET 2017 Medium