a parallel plate capacitor is located horizontally such

Releted Question 1

A parallel plate capacitor of capacitance $$C$$ is connected to a battery and is charged to a potential difference $$V.$$ Another capacitor of capacitance $$2C$$ is similarly charged to a potential difference $$2V.$$ The charging battery is now disconnected and the capacitors are connected in parallel to each other in such a way that the positive terminal of one is connected to the negative terminal of the other. The final energy of the configuration is

A. zero

B. $$\frac{3}{2}C{V^2}$$

C. $$\frac{{25}}{6}C{V^2}$$

D. $$\frac{9}{2}C{V^2}$$

Releted Question 2

A. $$\frac{{\left( {{Q_1} + {Q_2}} \right)}}{{2C}}$$

B. $$\frac{{\left( {{Q_1} + {Q_2}} \right)}}{C}$$

C. $$\frac{{\left( {{Q_1} - {Q_2}} \right)}}{C}$$

D. $$\frac{{\left( {{Q_1} - {Q_2}} \right)}}{{2C}}$$

Releted Question 3

A. With $${S_1}$$ closed $${V_1} = 15\,V,{V_2} = 20\,V$$

B. With $${S_3}$$ closed $${V_1} = {V_2} = 25\,V$$

C. With $${S_1}$$ and $${S_2}$$ closed, $${V_1} = {V_2} = 0$$

D. With $${S_1}$$ and $${S_3}$$ closed, $${V_1} = 30\,V,{V_2} = 20\,V$$

Releted Question 4

A. $$\frac{1}{K} = \frac{1}{{{K_1}}} + \frac{1}{{{K_2}}} + \frac{1}{{2{K_3}}}$$

B. $$\frac{1}{K} = \frac{1}{{{K_1} + {K_2}}} + \frac{1}{{2{K_3}}}$$

C. $$K = \frac{{{K_1}{K_2}}}{{{K_1} + {K_2}}} + 2{K_3}$$

D. $$K = {K_1} + {K_2} + 2{K_3}$$