COMEDK · Physics · 17. Electrostatics
The number of excess electrons found on an object when 1.6 C charge is given to that object is:
- A \(10^8\) electrons
- B \(10^{10}\) electrons
- C \(10^{19}\) electrons
- D \(10^{18}\) electrons
Answer & Solution
Correct Answer
(C) \(10^{19}\) electrons
Step-by-step Solution
Detailed explanation
The total charge \(Q\) on an object is quantized and given by the relation \(Q = ne\), where \(n\) is the number of electrons and \(e\) is the elementary charge. Given \(Q = 1.6\) C and \(e = 1.6 \times 10^{-19}\) C. Substituting these values into the formula:…
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 gaseous mixture consists of \(16 \mathrm{~g}\) of helium and \(16 \mathrm{~g}\) of oxygen. The ratio \(C_{p} / C_{V}\) of the mixture isCOMEDK 2020 Easy
- An unknown resistance \(R_{1}\) is connected in series with a resistance of \(10 ~\Omega\). This combination is connected to one gap of a meter bridge, while a resistance \(R_{2}\) is connected in the other gap. The balance point is at \(50 \mathrm{~cm}\). Now, when the \(10 ~\Omega\) resistance is removed, the balance point shifts to \(40 \mathrm{~cm}\). The value of \(R_{1}\) (in \(\Omega\) ) isCOMEDK 2013 Medium
- Point charges \(-3 \mathrm{Q},-\mathrm{q}, 2 \mathrm{q}\) and 2 Q are placed, one at each corner of a square. The relation between Q and q for which the potential at the centre of the square is zero isCOMEDK 2025 Easy
- At Kavalur in India, the astronomers using a telescope whose objective had a diameter of one metre started using a telescope of diameter \(2.54 \mathrm{~m}\). This resulted inCOMEDK 2017 Medium
- In the figure below, the capacitance of each capacitor is \(3 \mu \mathrm{F}\). The effective capacitance between \(A\) and \(B\) is
COMEDK 2023 Easy - For CE transistor amplifier, the audio signal voltage across the collector resistance of \(4 \mathrm{l} \Omega\) is \(5 \mathrm{~V}\). If the current amplification factor of the transistor is 100 and base resistance is \(2 \mathrm{k} \Omega\), then input signal voltage isCOMEDK 2022 Hard
More PYQs from COMEDK
- Arrange the following ions in the decreasing order of their ionic radii: \(\mathrm{Cl}^{-}, \mathrm{Ca}^{2+}, \mathrm{S}^{2-}, \mathrm{K}^{+}\)COMEDK 2025 Medium
- In dilute alkaline solution \(\mathrm{MnO}_4^{-}\) changes toCOMEDK 2023 Easy
- An element with atomic number 21 is aCOMEDK 2017 Easy
- The maximum value of \(Z=10 x+16 y\), subject to constraints \(x \geq 0, y \geq 0, x+y \leq 12,2 x+y \leq 20\) isCOMEDK 2023 Medium
- The chemical name of anisole isCOMEDK 2017 Easy
- If \(A=\left[\begin{array}{lll}5 & 0 & 4 \\ 2 & 3 & 2 \\ 1 & 2 & 1\end{array}\right] \quad B^{-1}=\left[\begin{array}{lll}1 & 3 & 3 \\ 1 & 4 & 3 \\ 1 & 3 & 4\end{array}\right]\) then \((A B)^{-1}\) is equal toCOMEDK 2024 Medium