A potential difference (or voltage) across a component is needed to make a current flow through it. Resistance is the extent to which an electrical component restricts current.
What is the name given to the observation that the current flowing through a resistor is directly proportional to potential difference?
What specifically are potentiometers?
When placed in series how do you calculate the total resistance of two or more resistors?
What do diodes regulate?
What specifically causes the change in electrical energy to heat and light in a filament lamp?
What do LEDs emit?
What is current measured in?
Where are thermistors often used?
What is the function of a capacitor?
Why is the usage of LEDs increasing?