Resistors & Resistance Flashcards
What is a Resistor?
a device having resistance to the passage of an electric current.
What is Resistance?
electrical resistance–is a force that counteracts the flow of current.
Name two types of resistors?
fixed resistors and variable resistors.
Name 2 types of fixed resistors?
Carbon film resistor
Carbon composition resistor
Metal film resistor
Metal oxide film resistor
Wire wound resistor
What are some factors affecting Resistance?
Material Of Wire/Conductor, Length of wire, and temperature
What is the difference between a Resistor and Resistance?
A resistor is a component whereas resistance is its property due to which it opposes the flow of electrons through it.
What is the ohm’s law equation for resistance?
The amount of electric current reduced by the resistor is determined by using the ohm’s law equation.
What is the basic unit used to measure the resistance of a resistor?
Ohm is the basic unit used to measure the resistance of a resistor.
Define fixed resistor.
Fixed resistor is a type of resistor which provides fixed resistance to the electric current.
Define variable resistor.
Variable resistor is a type of resistor which controls (increases or decreases) the flow of electric current by changing its resistance.
List different types of variable resistors
The different types of variable resistors include:
Rheostat
Potentiometer
Trimmer
What is the symbol for change in Resistance?
/_\ R
