Recent content by tsoits

1) Yes. There will be an ammeter reading. Of course that depends on how sensitive the ammeter is. Using a galvanometer may be better. 2) You may regard it as a discharge process. So there will be joule heating at the internal resistance of the battery, the circuit, etc. Note that the energy...

Thanks DaleSpam, this is exactly the answer I want! It's a pity that the copy of Jackson's I got is no longer using cgs; so I just barely heard of the name cgs before without knowing such a consequence. Thanks also to Born2bwire =)

Thanks! This goes back to my original question in the title: "Why is Ampere a base unit, rather than a derived unit?" I thought about this because I noticed that while other base units' definition are quite self explanatory, the definition of Ampere seems to be derived from Newton.

Thanks. Of course here I'm not talking about the value, but the dimension. Let me put it this way. Why can't we define A = \frac{C}{s} = {\sqrt{N}} ? What kind of inconsistency would occur?

In my equation, the physical meaning of ampere is not altered. It is still having exactly the same definition as now: the current which two parallel conductor would generate a force of 1N on each other. As long as there is no inconsistency in the definition, there shouldn't be problem for its...

There're definitely energy exchange in the transient stage. But here we simply have to look at the steady state, and we can deduce what have happened. As you mentioned in the first post, when removing the dielectric, the capacitance has decreased, C = Q / V V is constant, Q must have...

Because of the absence of the dielectric!

Charges will flow back through the d.c. source so that the charges stored in the capacitor will decrease to q.

1) Analogy in F = ma From experiment, we find that F = k m a and we deliberately choose k = 1 (dimensionaless) and thus we define the unit Newton, a derived unit. 2) In the definition of ampere, it is in terms of the force per unit length between two straight parallel conductors...