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What is the rule for combining a group of resistors in series into a single equivalent resistor?
If two resistances or impedances in series are equal and of the same value, then the total or equivalent resistance, RT is equal to twice the value of one resistor. That is equal to 2R and for three equal resistors in series, 3R, etc.
What happens when you put 2 resistors in series?
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 around the circuit add up to the voltage of the supply.
Can you put multiple resistors in a circuit?
For instance a 30k resistor is not an E12 series value, but you can obtain it by putting two 15k resistors in series to allow a higher voltage. 0603 resistors have a working voltage of 50V, So if you want to use them in a 70V circuit you’ll have to place at least two of them in series.
Can a parallel resistor be combined with a series resistor?
One could also combine different values of resistors in series or parallel, but the share of power dissipated by each resistor would be proportional to its resistance for series-wired resistors, or inversely-proportional to its resistance for parallel wired.
Can you make a high power resistor from a low power one?
Yes, you can make a high power resistor from multiple low power ones. The simplest way to do this is to put them all either in series or all in parallel. With N resistors in series, make each 1/N the total desired resistance. Similarly, with N resistors in parallel, make each N times the desired resistance.
Is the total resistance of a resistor the same?
The short answer: Yes. It’s the same. The current through resistors in series stays the same, but the voltage across each resistor can be different. The sum of the potential differences (voltage) is equal to the total voltage. To find their total resistance: