Circuit Basics

• Define current and state an equation that links current, charge and time

  Current is a flow of electricity which results from the ordered directional movement of electrically charged particles.

  Current = Charge

  —————

  Time
• What is meant by the potential difference and resistance in a circuit?

  Potential difference refers to the voltage or electric potential energy difference between two points in a circuit. Resistance is the measure of how much a material or component opposes the flow of electric current.
• What is the equation that links potential difference, current and resistance

  Potential Difference = Current x Resistance
• Name one linear component and one non-linear component

  Non linear = diode

  Linear = Ohmic Conductor
• True or false? The resistance of an LDR increases with light intensity

  False
• What happens to the resistance of a thermistor as it gets hotter

  It decreases