COMEDK · Physics · 18. Capacitance
How many \(6 \mu \mathrm{F}, 200 \mathrm{~V}\) condensers are needed to make a condenser of \(18 \mu \mathrm{F}, 600 \mathrm{~V}\) ?\
- A 9
- B 18
- C 3
- D 27
Answer & Solution
Correct Answer
(D) 27
Step-by-step Solution
Detailed explanation
We know that, in series combination of capacitors, net potential difference is equal to sum of the individual potential difference of each capacitor i.e., \(V=V_{1}+V_{2}+V_{3} \ldots . . \quad\left[V_{1}=V_{2}=V_{3}=200 \mathrm{~V}\right]\) \(\Rightarrow 600=n \times 200\)…
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
- An electron and a proton having mass \(m_e\) and \(m_p\) respectively, initially at rest, move through the same distance '\(s\)' in a uniform electric field '\(E\)'. If the time taken by them to cover that distance is \(t_e\) and \(t_p\) respectively, then \(t_e / t_p\) is equal to:COMEDK 2023 Medium
- \({ }_{92} \mathrm{U}^{235}\) undergoes successive disintegrations with the end product of \({ }_{82} \mathrm{~Pb}^{203}\). The number of \(\alpha\) and \(\beta\) particles emitted areCOMEDK 2018 Easy
- A body of mass 0.5 kg is dropped from a height of 2 m on the top of the spring of length 0.6 m , fixed vertically on the horizontal table. If the spring is depressed by a distance of 10 cm , then what will be the spring constant of the spring? \(g=10 \mathrm{~ms}^{-2}\)COMEDK 2025 Medium
- One end of the string of length \(l\) is connected to a particle of mass \(m\) and the other end is connected to a small peg on a smooth horizontal table. If the particle moves in circle with speed \(v\), the net force on the particle (directed towards centre) will be ( \(T\) represents the tension in the string)COMEDK 2023 Easy
- The distance of closest approach when an alpha particle of kinetic energy \(6.5 \text{ MeV}\) strikes a nucleus of atomic number 50 isCOMEDK 2024 Medium
- Current flows through uniform, square frames and their connecting wires as shown in the figure. In which case is the net magnetic field at the centre of the frame not zero?
COMEDK 2024 Medium
More PYQs from COMEDK
- If \(A=\{a, b, c\}, B=\{b, c, d\}\) and \(C=\{a, d, c\}\), then \((A-B) \times(B \cap C)=\)COMEDK 2016 Easy
- A wire '\(l\)' m long bent into a circular loop is placed perpendicular to the magnetic field of flux density \(B \text{ Wbm}^{-2}\). Within 0.1sec, the loop is changed into a square of side '\(a\)' m and flux density is doubled. The value of e.m.f. induced isCOMEDK 2024 Medium
- Given below are 2 statements: Assertion and Reason. Choose the correct option.
Assertion: When Molar conductivity for a strong electrolyte is plotted versus \(\sqrt{C}(\mathrm{~mol} / \mathrm{L})^{1 / 2}\), a straight line is obtained with intercept equal to Molar conductivity at infinite dilution for the electrolyte and Slope equal to \(-\mathrm{A}\). All electrolytes of a given type have the same \(\mathrm{A}\) value.
Reason: At infinite dilution, strong electrolytes of the same type will have different number of ions due to incomplete dissociation.COMEDK 2024 Medium - The value of \(\dfrac{1}{2 \sin 10^{\circ}}-2 \sin 70^{\circ}\) isCOMEDK 2025 Medium
- The angle between the circles
\(\begin{aligned}
&x^{2}+y^{2}+4 x+2 y+1=0 \text { and } \\
&x^{2}+y^{2}-2 x+6 y-6=0 \text { is }
\end{aligned}\)COMEDK 2012 Easy - The resistance of a galvanometer is \(2.5 \Omega\) and it requires \(50 \mathrm{~mA}\) for full scale deflection. The value of shunt resistance required to convert it into an ammeter of range 0 to \(5 \mathrm{~A}\) isCOMEDK 2014 Easy