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37 country code


When trying to make international calls, it can be a minefield to work out which calling codes and numbers go where and what to dial and what not to dial. We have therefore created a useful tool which will help you locate the right international calling codes for countries all around the world. Use our calling code search tool to find the international calling code for the country you are calling. Calls to cell phones registered in another country are often charged much higher rates than calls to fixed lines.

Polymer dielectrics


The capacitance of a capacitor refers to its ability to store charges. When an external electric field is applied to a material, it induces dipole moments that separate the negative charge centers from the positive charge centers in the electrons; this mechanism is known as polarization. The polarization of the dielectric generates an electric field that is in the opposite direction of the external field, contributing to the capacitance increase. The capacitance of a capacitor with dielectric material is governed by.