**Example: Calculate capacitance charge and power:
calculate capacitance example.**
This example is to calculate capacitance, charge and power of rectangle plate capacitor with dielectric
constant 3.9.

In main menu, click Popular services>Semiconductor, then click Capacitance
calculator. Then choose plate rectangle as plate shape from the list, give dielectric
constant 3.9.

**Check Calculate Q(V) &W(V)**. Click next step button to calculation page.

Figure 1. Setup capacitance calculation.

The user gives length 1E-5cm, width 2E-5cm and thickness 1E-7 cm of the capacitor plate, and operation voltage 2V.
Click calculation button to get the value(s) of capacitance, charge, power and field at 2V. The bottom of figure
2 shows the input that leads to results shown.

Figure 2. Calculate capacitance, charge and power at given voltage.

The user can calculate size of capacitor. The following figure 3 shows the input
for the case in which the desired capacitance is 4.E-13 F and length is 1E-6cm,
thckness 1.5E-5cm at operation voltage 2V. Click calculate button can lead to thickness width 17.38cm. Following this example,
the user may calculate length by giving capacitance and thickness.

Figure 3. Calculate width of capacitor.