How to insert an equation with integral

This tip display how to insert an equation for example, the Gauss's law, also known as Gauss's flux theorem.

How to add an equation in your document, see Working with Microsoft Equation.

To add integral form of the Gauss's law, do the following:

In the Professional presentation:

    1.    Create your own equation.

    2.    Under Equation Tools, on the Design tab, in the Structures group, click the Integral button:

Integral button in equations Word 2016

In the Integral list choose Contour Integral:

Contour Integral in Word 2016

    3.    In the integral template:

  • In the lower box enter S.
  • In the upper box right-click and choose Hide Upper limit in the popup menu:
    Hide Upper limit in popup menu Word 2016
  • In the base right box enter E.

    4.    Under Equation Tools, on the Design tab, in the Symbols group, in the list of symbols choose Bullet symbol in equations Word 2016.

    5.    Then enter dA=.

    6.    Under Equation Tools, on the Design tab, in the Structures group, click the Fraction button. In the Fraction list choose Stacked Fraction:

Stacked Fraction in Word 2016

    7.    Enter Q in the top of your fraction.

    8.    In the bottom of your fraction, do the following:

  • on the Equation Tools Design tab, in the Structures group, click the Script button.
  • in the Script list choose Subscript:
    Script symbol in equations Word 2016
  • on the Equation Tools Design tab, in the Symbols group, in the list of symbols choose Epsilon symbol in equations Word 2016,
  • in the lower box of the subscript enter 0.
Gauss's law in Word 2016

In the Linear presentation:

    1.    Create your own equation.

    2.    Do one of the following:

  • Under Equation Tools, on the Design tab, in the Symbols group, click the More button:
    More symbols in Word 2016

    In the top of list of symbols choose Operators:

    Menu in Word 2016

    In the Operators list choose Countor Integral in equations Word 2016.
  • Simply enter \oint.

    3.    Enter _S. Then you enter a space key, this linear formula transformed to the professional format.

    4.    In the base box of integral, enter E.

    5.    Under Equation Tools, on the Design tab, in the Symbols group, choose Bullet symbol in equations Word 2016 (or simply enter \bullet).

    6.    Then enter dA=Q/, choose Epsilon symbol in equations Word 2016 (or simply enter \varepsilon) and then _0:

linear part in Word 2016

Then you enter a space key, your linear formula transformed to the professional format.

See also how to create other types of equations.

See also this tip in French: Comment insérer une équation avec l’intégrale.

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