When resistors are connected in series, the total voltage (or potential difference) across all the resistors is equal to the sum of the voltages across each resistor. In other words, the voltages ...

University students of all subjects will each have their standard texts ... so when the current through the resistor reaches 600mA the voltage across it becomes enough to turn on the transistor.

times \frac{{{R_1}}}{{{R_1} + {R_2}}}\) Of the three relationships stated above, any one can be used to find the voltage across a given resistor. If one of the resistances in a voltage divider ...