Contents
What is the resistance answer?
Resistance is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω). Conductors: Materials that offer very little resistance where electrons can move easily.
What does the resistance of a resistor depend on?
Resistance depends on an object’s size, shape, and material. In Figure 3 below, the cylinder’s resistance is directly proportional to its length l. The longer the cylinder, the higher the resistance. Additionally, the resistance is inversely proportional to the cross sectional area A.
What is resistance Why do we use resistance?
Resistance is the hindrance to the flow of electrons in material. While a potential difference across the conductor encourages the flow of electrons, resistance discourages it. The rate at which charge flows between two terminals is a combination of these two factors.
What are the questions for OHM’s law and resistance?
Ohm’s Law and resistance test questions 1. As the voltage across a resistor is increased, what happens to the resistance of the resistor? 2. What is the current in this circuit? 3. What is the resistance of the resistor in this circuit? 4. If the resistance in this circuit is halved, what will
What are the current and resistance questions in Khan Academy?
Current and resistance questions Google ClassroomFacebookTwitter Email Current and resistance Practice: Current and resistance questions This is the currently selected item. Current and resistance Introduction to circuits and Ohm’s law
Are there any questions about current and resistance?
Questions pertaining to current and resistance If you’re seeing this message, it means we’re having trouble loading external resources on our website. If you’re behind a web filter, please make sure that the domains *.kastatic.organd *.kasandbox.orgare unblocked.
What happens to the resistance of a resistor?
As the voltage across a resistor is increased, what happens to the resistance of the resistor? What is the current in this circuit? What is the resistance of the resistor in this circuit? If the resistance in this circuit is halved, what will the current be? The diagram shows part of a circuit.