1. You need to type the vector form of electric quantity symbols such as current and voltage on the computer, and you can use the formula editor to type in the word document.

2. After opening the word document, click Insert-Object to open the dialog box. Click "Microsoft Equation 3.0" in the "New" drop-down menu, and the formula editor will appear. A rectangular shadow box appears where the formula needs to be entered on the document page, and the tab bar of the page has also changed, and a toolbar for entering the formula appears.

3. Click the button with arrow on the box in the toolbar, and a dotted box with arrow will appear where you need to enter the formula. Just enter the current and voltage symbols in the dotted box. The effect is as follows: