Resistance and electrical work

• What is resistance measured in?

  Ohms
• What is the size of the current affected by?

  Resistance: Resistance increased, the current decreases

  Potential difference: Potential difference increase, current increase
• What does a diode do?

  Only allows current to flow through it in one direction
• What is a rectifier?

  Component that turns an alternating current into a direct current
• What does a thermistor do?

  Resistance changes with its temperature
• What does an LDR do?

  Resistance changes with light intensity
• LDR resistance

  increasing light intensity decreases the resistance
• Where does charge flows?

  From the energy source and through the rest of the circuit
• Ohms law?

  Ohmic conductors obey this
• Ohmic conductors?

  Current though an ohmic conductor is directly proportional to the potential difference across the resistor
• Ohmic conductors and resistance

  Resistance remains constant as the current changes