## Principles of Electricity and Electromagnetism |

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Page 69

component of VD and the

localized, the surface integral vanishes on choosing a sufficiently distant surface

and the

1.13).

component of VD and the

**volume**integral of D • grad V. If the charges arelocalized, the surface integral vanishes on choosing a sufficiently distant surface

and the

**volume**integral may be written U = | J*D • E dv (2.33) by the aid of Eq. (1.13).

Page 190

available energy is the difference between the product of the pressure and

liquid evaporation the

metal is ...

available energy is the difference between the product of the pressure and

**volume**for the electron gas on the two sides of the boundary. As in the case ofliquid evaporation the

**volume**occupied by a unit charge of electrons within themetal is ...

Page 595

The significance of the concept of divergence may be seen from a consideration

of the infinitesimal

representing, say, the flow of a fluid or an electric current, at the center of the

element is v.

The significance of the concept of divergence may be seen from a consideration

of the infinitesimal

**volume**element in Fig. D.9. The value of the vector,representing, say, the flow of a fluid or an electric current, at the center of the

element is v.

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