Whatever you like. A good picture framer will make frames in any size.
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The turns ratio of a current transformer (CT) refers to the ratio of the number of turns in the primary winding to the number of turns in the secondary winding, which determines how the primary current is scaled down to a measurable level. In contrast, the current ratio indicates the relationship between the primary current and the secondary current, reflecting how much the CT reduces the current for measurement purposes. Essentially, while the turns ratio is a design characteristic of the transformer, the current ratio is a functional aspect that describes its performance in operation.
When you want to group several controls together - name and address, for example - you use a Frame. The frame backcolor can be the same as the form's and only the frame borders will be obvious, or it can be a different color and stand out.You create the frame before the controls. When you create controls in a frame, they are tied to the frame and move with it. The frame caption is the text that appears at the top of the frame - you use it to define the group.
ratio of secondry voltage to primary voltage is called voltage transformation ratio
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The ratio of RB1 to RBBO is the intrinsic standoff ratio. It is the standoff voltage ratio to the power supply voltage.