JEE Mains · Physics · STD 12 - 8. Electromagnetic waves
A parallel plate capacitor consisting of two circular plates of radius 10 cm is being charged by a constant current of 0.15 A . If the rate of change of potential difference between the plates is \(7 \times 10^8 \mathrm{~V} / \mathrm{s}\) then the integer value of the distance between the parallel plates is \(\left(\right.\) Take, \(\left.\epsilon_0=9 \times 10^{-12} \frac{\mathrm{~F}}{\mathrm{~m}}, \pi=\frac{22}{7}\right)\) ________ \(\mu \mathrm{m}\).
- A 1320
- B 1310
- C 1330
- D 1340
Answer & Solution
Correct Answer
(A) 1320
Step-by-step Solution
Detailed explanation
\(\begin{aligned} & Q=c V \\ & V=\frac{Q}{c}=\frac{i t}{\left(\frac{\varepsilon_0 A}{d}\right)} \\ & d=\frac{\varepsilon_0 \pi r^2}{i}\left(\frac{v}{t}\right) \end{aligned}\) Putting values…
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