Hey, I am wondering whether someone could help me with this question, attached below as an image. For some reason electronics has always been something I find difficult to comprehend and I have some deep misunderstandings, so I'm trying to work hard on the subject for my degree. My current approach is as follows. I know how to draw a Thevenin circuit, but I'm not sure about how to work out RTh and VTh in this circuit. The Thevenin voltage must be that across the 150 Ohm resistor, which is 15V (?). The Thevenin resistance is the parallel sum of the 300Ohm and 150Ohm resistor with the series sum of the 50Ohm resistor. This works out to be 150 Ohms. Sorry about the somewhat unclear wordy solution I have given. According to my (wrong?) method VTh = 15V and RTh = 150 Ohms. Am I right? Thevenin's theorem, applied to certain situations I'm confused about, is impeding me significantly in moving onto other topics so I'd really appreciate someone to help me with this question.