Generally upstream is closer to the positive (+) voltage source. In the case of an NPN transistor upstream of the transistor is the part of the circuit from (+) to the NPN collector pin. Downstream of the transistor is from the NPN emitter pin to the ground / sink / negative (-) terminal.
Chat with our AI personalities
ur face
You measure voltage using a voltmeter which involves measuring the electrical potential difference between 2 points in an electrical circuit.
In an electrical power transmission system: the grid is what the feeder feed into.
Electrical is an one type of energy ie flow of electrons... this flow of electrons constitutes the Electricity which we are using for our use
Read this artical http://www.picometrix.com/pico_products/an_band_terms.asp