How to find High pass and Low pass circuits

1. Often it's hard to remember whether the given circuit is High pass circuit or Low pass circuit. See the picture below.

2. And its even harder to remember whether low pass circuit acts as differentiating circuit or integrating circuit. Same confusion with high pass filter. So here is trick.

Remember the  word DHIL (in Hindi DHIL means heart),

You can expand DHIL as Differentiator is High pass and Integrator is Low pass.

By : Chetan-Achari