Student Login

Home›Chapters›Capacitors PYQs›Charge Sharing & Loss of Energy›Question 27

JEE Main 2020 (7 Jan, Shift 2) · Charge Sharing & Loss of Energy

Charge Sharing & Loss of Energy question from JEE Main 2020 (7 Jan, Shift 2)

Q27JEE Main 2020 · 7 JAN · SHIFT 2Easy

Charge Sharing & Loss of Energy

A 60 pF capacitor is fully charged by a 20 V supply. It is then disconnected from the supply and is conneced to another uncharged 60 pF capacitor in parallel. The electrostatic energy that is lost in this process by the time the charge is redistributed between them is (in nJ) _____

Numerical answer type. Work it out, then open the answer.

Show answer and solution

Answer: 6

For two identical capacitors, loss $= \frac{1}{4}CV^2$ .
$\Delta U = \frac{1}{4} \times 60 \times 10^{-12} \times 20^2 = 6 \times 10^{-9}$ J
Energy lost $= 6$ nJ

Report a mistake

More questions on Charge Sharing & Loss of Energy

A 5 μ F capacitor is charged fully by a 220 V supply. It is then disconnected from the…JEE Main 2020 (2 Sep, Shift 1)
Two capacitors of capacitances C and 2C are charged to potential differences V and 2V…JEE Main 2020 (5 Sep, Shift 1)
Two identical capacitors C₁ and C₂ of equal capacitance are connected as shown in the…NEET 2019
In the figure shown, after the switch 'S' is turned from position 'A' to position 'B'…JEE Main 2019 (12 Jan, Shift 1)
A capacitor C1 = 1.0 μ F is charged up to a voltage V = 60 V by connecting it to battery…JEE Main 2018 (15 Apr, Shift 2)
A capacitor is charged by a battery. The battery is removed and another identical…NEET 2017
A capacitor of 2 μ F is charged as shown in the diagram. When the switch S is turned to…NEET 2016 (Phase 1)
Two capacitors C₁ and C₂ are charged to 120 V and 200 V respectively. It is found that…JEE Main 2013