AP EAMCET · PHYSICS · Electrostatics
Flux coming out from a unit positive charge kept in air is
- A \(\varepsilon_{\mathrm{o}}\)
- B \(\left(\varepsilon_{\mathrm{o}}\right)^{-1}\)
- C \(\left(4 \pi \varepsilon_{\mathrm{o}}\right)^{-1}\)
- D \(4 \pi \varepsilon_o\)
Answer & Solution
Correct Answer
(B) \(\left(\varepsilon_{\mathrm{o}}\right)^{-1}\)
Step-by-step Solution
Detailed explanation
Flux is given by: \(\phi=\frac{q}{\epsilon_0}\) If \(\mathrm{q}=\) unit positive charge, \(\phi=\frac{1}{\epsilon_0}=\left(\epsilon_0\right)^{-1}\)
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 three logic gates are connected as shown in the figure, then the correct truth table of the circuit is
AP EAMCET 2025 Medium - If \(B_1\) is the magnetic field induction at a point on the axis of a circular coil of radius \(R\) situated at a distance \(R \sqrt{3}\) and \(B_2\) is the magnetic field at the centre of the coil, then the ratio of \(\frac{B_1}{B_2}\) is equal toAP EAMCET 2020 Medium
- The mass of oxygen gas occupying a volume of 11.2 litres at a temperature \(27^{\circ} \mathrm{C}\) and a pressure of \(760 \mathrm{~nm}\) of mercury in kilograms is \([\) Molecular weight of oxygen \(=32]\)AP EAMCET 2002 Medium
- If current of 80 A is passing through a straight conductor of length 10 m, then the total momentum of electrons in the conductor is \(\left(\right.\) mass of electron \(=9.1 \times 10^{-31} \mathrm{~kg}\) and charge of electron \(\left.=1.6 \times 10^{-19} \mathrm{C}\right)\)AP EAMCET 2025 Medium
- A steel wire of length 81 cm has a mass of \(5 \times 10^{-3} \mathrm{~kg}\). If the wire is under a tension of 50 N, then the speed of transverse waves on the wire isAP EAMCET 2025 Medium
- A ball of mass \(10 \mathrm{~g}\) is allowed to fall down from 10 \(\mathrm{m}\) height. After collision with the ground if \(50 \%\) of its energy is lost, then the height reached by the ball isAP EAMCET 2023 Medium
More PYQs from AP EAMCET
- In which of the following reactions, hydrogen is liberated?
(i) \(\mathrm{Al}(s)+\mathrm{HCl}(a q) \longrightarrow\)
(ii) \(\mathrm{Al}(s)+\mathrm{NaOH}(a q) \longrightarrow\)
(iii) \(\mathrm{NaBH}_4+\mathrm{I}_2 \longrightarrow\)AP EAMCET 2017 Easy - If \(\mathbf{a}\) and \(\mathbf{b}\) are two unit vectors such that \(\mathbf{a}+\mathbf{b}\) is also \(\mathbf{a}\) unit vector, then \(|\mathbf{a}-\mathbf{b}|^2=\)AP EAMCET 2018 Medium
- A bowling machine placed at a height \(h\) above the earth surface releases different balls with different angles but with same velocity \(10 \sqrt{3} \mathrm{~ms}^{-1}\). All these balls landing velocities make angles \(30^{\circ}\) or more with horizontal. Then the height ' h ' (in meters) (acceleration due to gravity \(=10 \mathrm{~ms}^{-2}\) )AP EAMCET 2024 Hard
- Let \(A\) be a square matrix of order 3 . Choose the correct option regarding the following statements
I. There exists a matrix \(B\) of order 3 such that \(A B=I_3\)
II. There exists a matrix \(C\) of order 3 such that \(C A=I_3\)
III. \(A\) is invertibleAP EAMCET 2020 Easy - The solution of \((x+y+1) \frac{d y}{d x}=1\) isAP EAMCET 2007 Easy
- For \(x^2-4 \neq 0\), the value of \(\frac{d}{d x}\left[\log \left\{e^x\left(\frac{x-2}{x+2}\right)^{\frac{3}{4}}\right\}\right]\) at \(x=3\) isAP EAMCET 2017 Easy