Is a Transistor a Variable Resistor Answer to Question

[@buturusca]

Hello, what videos would be recommended to be viewed in the series mentioned at 11:57 ?

[@samsam100b]

🎉🎉best job

[@Akeshma]

is it possible to replace high power resistor say 10w 20hom with an npn transistor? so that by using its beta we find the value of base transistor to limit the colector current