Preview - Interview questions - Two capacitors
Jan. 12th, 2026 12:00 pmBy default, I post to access list so that only the people I subscribe to can see it. I subscribe to everyone I interact with on this platform, so if you want to see my posts, subscribe and I'll grant access. This is a copy of an old post to give you a sense of what to expect.
По умолчанию я пишу под замок, но даю доступ всем, с кем общаюсь на этой платформе. Это публичный повтор старого поста, привожу его в качестве примера.
For candidates with EE or physics degrees.
I have two identical capacitors with capacity C. One is charged to voltage V, the other is not charged. Energy in this system is C*V^2/2+0. I connect the capacitors in parallel, half the charge flows over, voltage evens out at V/2, energy in the system becomes C*(V/2)^2/2+C*(V/2)^2/2. Where did half the energy go?
По умолчанию я пишу под замок, но даю доступ всем, с кем общаюсь на этой платформе. Это публичный повтор старого поста, привожу его в качестве примера.
For candidates with EE or physics degrees.
I have two identical capacitors with capacity C. One is charged to voltage V, the other is not charged. Energy in this system is C*V^2/2+0. I connect the capacitors in parallel, half the charge flows over, voltage evens out at V/2, energy in the system becomes C*(V/2)^2/2+C*(V/2)^2/2. Where did half the energy go?




