Hi all I have a homework question which i would like someone to verify my results please. I have a npn transistor. Rl and Rb are not given. Common emitter configuration. Vcc is 18V. Power is 2W. So using P=VI, transpose this gives me I = P/V = 2/18= 111mA Hfe is IC/IB Note hfe min is 180 Ib is therefore ic/hfe = 111mA/ 180 = 616uA If the input to base is 3V, then to calculate Rb is 3-vbe/Ib, this is then 3-0.7/616uA= 1.8K. Dies this seem correct??