enEnglishguગુજરાતી
GUJCET · Physics · Electrostatic Potential and Capacitance
Work done in placing a charge of \(8 \times 10^{-18} C\) on a capacitor of capacitance \(800 \mu F\) is _________.
- A \(4 \times 10^{-32} J\)
- B \(32 \times 10^{-32} J\)
- C \(3.1 \times 10^{-26} J\)
- D \(16 \times 10^{-32} J\)
Answer & Solution
Correct Answer
(A) \(4 \times 10^{-32} J\)
Step-by-step Solution
Detailed explanation
(A)
work done \(W = U =\frac{ Q ^2}{2 C }\)
\(\begin{array}{l}W=\frac{\left(8 \times 10^{-18}\right)^2}{2 \times 800 \times 10^{-6}} \\ W=4 \times 10^{-32} J\end{array}\)
work done \(W = U =\frac{ Q ^2}{2 C }\)
\(\begin{array}{l}W=\frac{\left(8 \times 10^{-18}\right)^2}{2 \times 800 \times 10^{-6}} \\ W=4 \times 10^{-32} J\end{array}\)
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 coil of surface area \(200 cm^2\) having 25 turns is held perpendicular to the magnetic field of intensity \(0.02 \frac{Wb}{ m ^2}\). The resistance of the coil is \(1 \Omega\). If it is removed from the magnetic field in 1 s , the induced charge in the coil is ________ C.GUJCET 2019 Hard
- Electric field intensity at points in between and outside two thin separated parallel sheets of infinite dimension with like charges of same surface charge density \((\sigma)\) are __________ and _________ respectively.GUJCET 2017 Hard
- A pure inductor of \(\mathbf{2 5 . 4 8 ~ m H}\) and a pure resistor of \(8 \Omega\) are connected in series with an AC source of frequency 50 Hz . The phase difference between current (I) and voltage (V) in this circuit is ______________ .GUJCET 2023 Hard
- Figure shows the electric field lines of four point charges A, B, C and D.
Which charge has the maximum magnitude ?GUJCET 2023 Medium - Magnetic flux linked with a coil is \(\phi=5 t^2+2 t+3\) where \(t\) is in second and \(\phi\) is in weber. At time \(t=1 sec\)., the value of induced emf is ________ Volt.GUJCET 2009 Easy
- The distance of the closest approach of an alpha particle fired at a nucleus with Kinetic energy \(K\) is \(r_{0}\). The distance of the closest approach when the \(\alpha\) - particle is fired at the same nucleus with Kinetic energy 2 K will be _________ .GUJCET 2015 Easy
More PYQs from GUJCET
- The speed of light in a medium is \(200 \times 10^8 cm / s\). Refractive index of a medium is ___________ \(\left( c =3 \times 10^8 m / s \right)\).GUJCET 2025 Hard
- Giving "T" symbol for true statement and "F" symbol for false statement select the correct option.
(i) Most naturally occurring amino acids have L-configuration.
(ii) β-D ribose sugar is present in RNA.
(iii) Amylose is water insoluble component made up of \(\alpha - D ^{+}\) glucose units.
(iv) All monosaccharides are non-reducing sugars.GUJCET 2020 Medium - Choose the correct option for column - I, II and III.
Column - I Column - II Column - III (i) Monoecious (p) Prevent both autogamy and geitonogamy (x) Caster, Maize (ii) Dioecious (q) Prevent autogamy but not geitonogamy (y) Papaya, Date
palmGUJCET 2026 Easy - Which of the following complexes prossess meridional isomer ?GUJCET 2019 Easy
- The integrating factor of the differential equation \(\left(\tan ^{-1} y-x\right) d y=\left(1+y^2\right) d x\) is ____________ .GUJCET 2020 Hard
- Which glycosidic linkage occurs in 'Amylopectin'?GUJCET 2022 Medium