Potential difference, current and resistance
Cards (18)
- What is the equation that relates voltage, current, and resistance?
- What does the equation v = ir represent?
- If a circuit has a current of 4 amps and a resistance of 2 ohms, what is the voltage?
- How do you find the resistance if you have a 24 volt battery producing 8 amps of current?
- What is the resistance when using a 24 volt battery and 8 amps of current?
- What happens to current when voltage increases while resistance remains constant?
- What does a graph of current against potential difference show when resistance is constant?
- What does a negative part of the current versus potential difference graph indicate?
- Why do circuits with only wires or resistors produce straight lines on the graph?
- How does the steepness of the line on a current versus potential difference graph change with different resistors?
- What does a smaller resistor require to drive a large current?
- What happens to resistance if the temperature increases?
- What is the effect of higher currents on wires over time?
- What do filament lamps contain that emits light when heated?
- How does the resistance of a filament lamp change as current increases?
- What is the characteristic of diodes regarding current flow?
- What happens to current in a diode when the potential difference is negative?
- What is the resistance of a diode in the reverse direction?