AP EAMCET · PHYSICS · Electrostatics
Two charges \(2 \mathrm{C}\) and \(6 \mathrm{C}\) are separated by a finite distance. If a charge of \(-4 \mathrm{C}\) is added to each of them, the initial force of \(12 \times 10^3 \mathrm{~N}\) will change to
- A \(4 \times 10^3 \mathrm{~N}\) (repulsion)
- B \(4 \times 10^2 \mathrm{~N}\) (repulsion)
- C \(6 \times 10^3 \mathrm{~N}\) (attraction)
- D \(4 \times 10^3 \mathrm{~N}\) (attraction)
Answer & Solution
Correct Answer
(D) \(4 \times 10^3 \mathrm{~N}\) (attraction)
Step-by-step Solution
Detailed explanation
\begin{aligned} & \text { Initial force, } F=k \frac{q_1 q_2}{r^2} \\ & F_1=k \cdot \frac{(2)(6)}{r^2} \\ & \text { New force, } F_2=k \frac{(2-4)(6-4)}{r^2}=k \frac{(-2)(2)}{r^2} \\ & \therefore \quad \frac{F_1}{F_2}=\frac{(2 \times 6)}{(-2 \times 2)} \\ & \frac{12 \times…
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
- As shown in the figure below, a point charge moves from point to a point traversing a path in a uniform The electric field is directed along a direction parallel to -axis. The coordinates of, and are and respectively. What is the work done by the field in the process?
AP EAMCET 2020 Hard - Two uniform stretched strings \(A\) and \(B\), made of steel, are vibrating under the same tension. If the first overtone of \(A\) is equal to the second overtone of \(B\) and if the radius of \(A\) is twice that of \(B\), the ratio of the lengths of the strings isAP EAMCET 2011 Medium
- Along the X-axis, three charges \(\frac{q}{2},-q\) and \(\frac{q}{2}\) are placed at \(x=0, x=a\) and \(x=2 a\) respectively. The resultant electric potential at \(x=a+r\) (if \(a< < r)\) is : ( \(\varepsilon_0\) is the permittivity of free space)AP EAMCET 2006 Medium
- A force \(\overrightarrow{\mathrm{F}}=4 \hat{\mathrm{i}}-15 \hat{\mathrm{j}} \mathrm{N}\), acts on a body resulting in a displacement of \(6 \hat{i}\). If the body had a kinetic energy of 7 joules at the beginning of the displacement, the kinetic energy at the end of the displacement isAP EAMCET 2022 Medium
- In a vehicles lifter, the enclosed gas exerts a force \(F\) on a small piston of \(8 \mathrm{~cm}\) diameter.
The pressure is transmitted to a second piston of diameter \(24 \mathrm{~cm}\). If the mass of the vehicle to be lifted is \(1400 \mathrm{~kg}\), then \(F\) must at least be \(\left(g=10 \mathrm{~ms}^{-2}\right)\)AP EAMCET 2021 Medium - Three identical charges, each \(2 \mu \mathrm{C}\) lie at the vertices of a right angled triangle as shown in the figure. Forces on the charge at \(B\) due to the charges at \(A\) and \(C\) respectively are \(F_1\) and \(F_2\). The angle between their resultant force and \(F_2\) is
AP EAMCET 2016 Medium
More PYQs from AP EAMCET
- If \(\sin \theta+\operatorname{cosec} \theta=2\), then the value of \(\sin ^{10} \theta+\operatorname{cosec}^{10} \theta\) is equal toAP EAMCET 2021 Easy
- Magnifying power of an astronomical telescope for normal adjustment is 10 and length of the telescope is \(110 \mathrm{~cm}\). Magnifying power of the same telescope, when the image is formed at the near point isAP EAMCET 2018 Medium
- The distance between two parallel planes \(a x+b y+c z+d_1=0\), \(a x+b y+c z+d_2=0\) is given by \(\frac{\left|d_1-d_2\right|}{\sqrt{a^2+b^2+c^2}}\).
If the plane \(2 x-y+2 z+3=0\) has the distances \(\frac{1}{3}\) and \(\frac{2}{3}\) units from the planes \(4 x-2 y+4 z+\lambda=0\) and \(2 x-y+2 z\) \(+\mu=0\) respectively, then the maximum value of \(\lambda+\mu\) isAP EAMCET 2023 Easy - If \(\log (x+y)-2 x y=0\), then \(y^{\prime}(0)=\)AP EAMCET 2020 Easy
- Which one of the following is a linear differential equation?AP EAMCET 2023 Easy
- The paramagnetic complex ion which has no unpaired electrons in \(t_2 g\) orbitals isAP EAMCET 2024 Hard