WB JEE 2022 | Capacitor Question 6 | Physics

Three concentric metallic shells A, B and C of radii a, b and c (a < b < c) have surface charge densities +$$\sigma$$, $$-$$$$\sigma$$ and +$$\sigma$$ respectively. The potential of shell B is

WB JEE 2022 Physics - Capacitor Question 6 English

$$(a + b + c){\sigma \over {{\varepsilon _0}}}$$

$${{\sigma c} \over {{\varepsilon _0}}}$$

$$\left( {{{{a^2}} \over c} - {{{b^2}} \over c} + c} \right){\sigma \over {{\varepsilon _0}}}$$

$$\left( {{{{a^2}} \over c} - b + c} \right){\sigma \over {{\varepsilon _0}}}$$

WB JEE 2018

MCQ (Single Correct Answer)

-0.5

The insulated plates of a charged parallel plate capacitor (with small separation between the plates) are approaching each other due to electrostatic attraction. Assuming no other force to be operative and no radiation taking place, which of the following graphs approximately shows the variation with time (t) of the potential difference (V) between the plates?

WB JEE 2018 Physics - Capacitor Question 9 English Option 1

WB JEE 2018 Physics - Capacitor Question 9 English Option 2

WB JEE 2018 Physics - Capacitor Question 9 English Option 3

WB JEE 2018 Physics - Capacitor Question 9 English Option 4

WB JEE 2017

MCQ (Single Correct Answer)

-0.25

Three capacitors of capacitance 1.0, 2.0 and 5.0 $$\mu$$F are connected in series to a 10 V source. The potential difference across the 2.0$$\mu$$F capacitor is

$${{100} \over {17}}$$V

$${{20} \over {17}}$$V

$${{50} \over {17}}$$V

10V

WB JEE 2016

MCQ (Single Correct Answer)

-0.25

Equivalent capacitance between A and B in the figure is

WB JEE 2016 Physics - Capacitor Question 10 English

20$${\mu F}$$

8$${\mu F}$$

12$${\mu F}$$

16$${\mu F}$$

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