Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Capacitor question

2023 · Q166
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Physics
  4. /Capacitor
  5. /2023 · Q166

Capacitor question

2023 · Q166

NEETPhysicsCapacitorMCQ+4 / −1

To produce an instantaneous displacement current of 2 mA2 \mathrm{~mA}2 mA in the space between the parallel plates of a capacitor of capacitance 4 μF4 ~\mu \mathrm{F}4 μF, the rate of change of applied variable potential difference (dVdt)\left(\frac{\mathrm{dV}}{\mathrm{dt}}\right)(dtdV​) must be :-

  1. A
    800 V/s800 \mathrm{~V} / \mathrm{s}800 V/s
  2. B
    500 V/s500 \mathrm{~V} / \mathrm{s}500 V/s
  3. C
    200 V/s200 \mathrm{~V} / \mathrm{s}200 V/s
  4. D
    400 V/s400 \mathrm{~V} / \mathrm{s}400 V/s
View written solutionFree

Correct answer: B

$$ \begin{aligned} & \mathrm{Q}=\mathrm{CV} \\\\ & \begin{aligned} \frac{\mathrm{dQ}}{\mathrm{dt}}=\mathrm{C} \cdot \frac{\mathrm{dV}}{\mathrm{dt}} \Rightarrow \frac{\mathrm{dV}}{\mathrm{dt}} & =\frac{\mathrm{I}}{\mathrm{C}}=\frac{2 \times 10^{-3}}{4 \times 10^{-6}} \\ & =\frac{10^3}{2}=500 \frac{\mathrm{V}}{\mathrm{s}} \end{aligned} \end{aligned} $$

PreviousNext

More from Capacitor

  • The equivalent capacitance of the system shown in the following circuit is: Includes diagram2023 · MCQ
  • The distance between the two plates of a parallel plate capacitor is doubled and the area of each plate is halved. If C is its initial capacitance, its final capacitance is equal to2022 · MCQ
  • The effective capacitances of two capacitors are 3 μF and 16 μF, when they are connected in series and parallel respectively. The capacitance of two capacitors are :2022 · MCQ
  • A capacitor of capacitance C = 900 pF is charged fully by 100 V battery B as shown in figure (a). Then it is disconnected from the battery and connected to another uncharged capacitor of capacitance C = 900 pF as shown in figure (b). The… Includes diagram2022 · MCQ
  • A parallel plate capacitor has a uniform electric field E in the space between the plates. If the distance between the plates is 'd' and the area of each plate is 'A', the energy stored in the capacitor is : (ε…2021 · MCQ
  • The equivalent capacitance of the combination shown in the figure is : Includes diagram2021 · MCQ
  • The capacitance of a parallel plate capacitor with air as medium is 6μF. With the introduction of a dielectric medium, the capacitance become 30 μF The permittivity of the medium is : (ε0​=8.85×10−12C2N−1m−2)…2020 · MCQ
  • A parallel plate capacitor of capacitance 20 μF is being charged by a voltage source whose potential is changing at the rate of 3V/s. The conduction current through the connecting wires, and the displacement current through the plates…2019 · MCQ