Im just taking an electrical (ppb introductory) course and cracking for test. Im really confused by frequency response sections(with filters). I dont know how to approach such problems, where it asked me to find out the frequency response of the circuit (given in a regular circuit or op-amp) and identify the type of filter. There are different types of frequency (low pass, high-pass, band-pass. Etc.), but I dont know how to determine it (neither graphing or some other method). In the text book, it mentions that when the load is in series with a resistor and the load is in parallel with capacitor, it gives low-pass. Also, when use capacitor and inductor, it gives bandpass filter). I cant see what filter it is just looking at a circuit. Also, I want to know how to compute omega-not wo, the cut-off frequency. In the book, it used (1/RC) for cut-off frequency for H(jw) = 1 / ( 1+jwCR). Is the the same for any type of circuit(which I think not). To my understanding, it has to do with the denominator. But how about when w is in both numerator and denominator? Also, I want to know more about dB when graphing. Is the slope always (+20 or -20 dB), no matter what? Any help will be appreciate. (Or any link that explains very well). Thanks in advance