TS EAMCET · Physics · Electrostatics
The electric field and electric potential at a point due to a point charge are \(500 \mathrm{NC}^{-1}\) and \(30 \mathrm{~V}\) respectively, then the magnitude of the charge is
- A \(1.3 \times 10^{-9} \mathrm{C}\)
- B \(3 \times 10^{-12} \mathrm{C}\)
- C \(2 \times 10^{-10} \mathrm{C}\)
- D \(1.6 \times 10^{-20} \mathrm{C}\)
Answer & Solution
Correct Answer
(C) \(2 \times 10^{-10} \mathrm{C}\)
Step-by-step Solution
Detailed explanation
Electric field, \(\mathrm{E}=500 \mathrm{~N} / \mathrm{C}\) Electric potential, \(\mathrm{V}=30 \mathrm{~V}\). \[ \begin{aligned} & \mathrm{E}=\frac{\mathrm{V}}{\mathrm{r}} \\ & \mathrm{r}=\frac{\mathrm{V}}{\mathrm{E}}=\frac{30}{500}=\frac{3}{50} \mathrm{~m} . \end{aligned} \]…
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
- A moving body with a mass \(m_1\) and velocity \(u\) strikes a stationary body of mass \(m_2\). The masses \(m_1\) and \(m_2\) should be in the ratio \(\frac{m_1}{m_2}\), so as to decrease the velocity of the first body to \(\frac{2 u}{3}\) and giving a velocity of \(v\) to \(m_2\) assuming a perfectly elastic impact. Then, the ratio \(\frac{m_1}{m_2}\) isTS EAMCET 2020 Easy
- Consider the two following statements \(A\) and \(B\), and identify the correct choice given in the answers : \((A)\) Duddell's thermo galvanometer is suitable to measure direct current only. (B) Thermopile can measure temperature differences of the order of \(10^{-3}{ }^{\circ} \mathrm{C}\).TS EAMCET 2003 Medium
- A coil has 1000 turns and \(500 \mathrm{~cm}^2\) as its area. The plane of the coil is placed at right angles to a magnetic induction field of \(2 \times 10^{-5} \mathrm{~Wb} / \mathrm{m}^2\). The coil is rotated through \(180^{\circ}\) in \(0.2 \mathrm{~s}\). The average emf induced in the coil, in \(\mathrm{mV}\), isTS EAMCET 2003 Easy
- A meteor of mass ' \(m\) ' having a speed ' \(v\) ' at infinity reaches the surface of the earth with a speed of ( \(\mathrm{v}_{\mathrm{e}}\) is escape speed from the earth's surface)TS EAMCET 2025 Medium
- A glass flask of volume one litre is filled completely with mercury at \(0^{\circ} \mathrm{C}\). The flask is now heated to \(100^{\circ} \mathrm{C}\). Coefficient of volume expansion of mercury is \(1.82 \times 10^{-4} /{ }^{\circ} \mathrm{C}\) and coefficient of linear expansion of glass is \(0.1 \times 10^{-4} /{ }^{\circ} \mathrm{C}\). During this process, amount of mercury which overflows isTS EAMCET 2013 Medium
- If the orbital speed of a body revolving in a circular path near the surface of the earth is \(8 \mathrm{kms}^{-1}\), then the orbital speed of a body revolving around the earth in a circular orbit at height of \(19,200 \mathrm{~km}\) from the surface of earth is (Radius of the earth \(=6400 \mathrm{~km}\) )TS EAMCET 2025 Medium
More PYQs from TS EAMCET
- If \(200 \mathrm{MeV}\) of energy is released in the fission of one nucleus of \({ }_{92}^{236} \mathrm{U}\), the number of nuclei that must undergo fission to release an energy of \(1000 \mathrm{~J}\) isTS EAMCET 2011 Medium
- An engine is dragging a mass of \(5000 \mathrm{~kg}\) with a velocity of \(5 \mathrm{~ms}^{-1}\) along a smooth inclined plane of inclination 1 in 50 . Then the power of the engine isTS EAMCET 2023 Medium
- Electromagnetic radiation of intensity \(0.6 \mathrm{Wm}^{-2}\) is falling on a black surface. The radiation pressure on the surface isTS EAMCET 2023 Easy
- The ratios of the voltage sensitivities, resistances and areas of the coils of two moving coil galvanometers \(A\) and \(B\) are \(4: 3,3: 4\) and \(1: 2\) respectively. If the number of turns of the coil of galvanometer A is 200, then the number of turns of the coil of galvanometer B is
(All other quantities remain same in both the cases)TS EAMCET 2025 Medium - The horizontal acceleration that should be given to a smooth inclined plane of angle \(\sin ^{-1}\left(\frac{1}{l}\right)\) to keep an object stationary on the plane, relative to the inclined plane is :TS EAMCET 2003 Medium
- In a time ' \(t\) ', the amplitude of vibrations of a damped oscillator becomes half of its initial value, then the mechanical energy of the oscillator decreases byTS EAMCET 2024 Easy