Podcast
Play an AI-generated podcast conversation about this lesson
Download our mobile app to listen on the go
Get App
Questions and Answers
What is resistance in an electrical circuit?
What is resistance in an electrical circuit?
- The potential difference applied to a conductor
- The opposition offered by a substance to the flow of electric current (correct)
- The rate of flow of electrons in a conductor
- The collision of free electrons with atoms and molecules
How does the length of a conductor affect resistance?
How does the length of a conductor affect resistance?
- Resistance decreases with an increase in the length of the conductor
- Resistance increases with an increase in the length of the conductor (correct)
- Resistance is inversely proportional to the length of the conductor
- Resistance is unaffected by the length of the conductor
What happens to resistance when the area of a conductor increases?
What happens to resistance when the area of a conductor increases?
- Resistance becomes inversely proportional to the area
- Resistance increases
- Resistance remains constant
- Resistance decreases (correct)
What is the unit of resistance?
What is the unit of resistance?
Signup and view all the answers
What is the symbolic representation of a resistor?
What is the symbolic representation of a resistor?
Signup and view all the answers
Flashcards are hidden until you start studying
Study Notes
Resistance in Electrical Circuits
- Resistance is the opposition that a conductor offers to the flow of electric current.
- It is a measure of how much a material resists the movement of electrons within a circuit.
Length of Conductor and Resistance
- The longer the conductor, the greater the resistance.
- Increased length means more collisions and interactions between electrons and atoms, hindering current flow.
Area of Conductor and Resistance
- When the cross-sectional area of a conductor increases, resistance decreases.
- A larger area allows more pathways for electrons to flow, reducing the likelihood of collisions.
Unit of Resistance
- The unit of resistance is the ohm, represented by the symbol Ω.
- One ohm is defined as the resistance between two points when a voltage of one volt produces a current of one ampere.
Symbolic Representation of a Resistor
- A resistor is commonly represented by a zigzag symbol in circuit diagrams.
- This representation helps differentiate it from other circuit elements and simplifies circuit construction and analysis.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
