Resistor combinations Flashcards
Name an advantage oh having a high resistance
Can be used in heaters as it produces heat
Name a disadvantage of having a high resistance
Could damage circuits because of the produced heat
What does a fixed resistor do?
Adds known levels of resistance into a circuit to control a current
How do you find the total resistance in a circuit?
You add up all of the values from the resistors
How do you increase the total resistance?
Add resistors in series’
What is the same in any series circuit?
The current is the same all the way around the circuit
How do you reduce the total resistance?
Add resistors in parallel circuits
What is the equation for total resistance when the resistors are the same?
1/r = 1/r2 + 1/r2
What is the equation for total resistance when the resistors are different?
R = ( R1 x R2 ) / ( R1 + R2)
