electricity

• What is a circuit?

  a closed loop that has a power source and is represented with circuit diagrams
• What is voltage?

  the force driving the flow of electrons
• What is thee current?

  A measure of the flow of electrons around a circuit
• What is resistance?

  everything that resists the flow of electrons
• What is the formula for voltage?

  v=IR
• What is the relationship between resistance and current?

  if the resistance is constant, as the current increases, the resistance will also increase
• What is the relationship between temperature and resistance?

  as the temperature increases, the resistance should also increase
• what do diodes do?

  they only allow the current to flow in one direction, they have a high resistance so that the current cant flow in any other direction
• what happens in a filament lamp?

  less current can flow through
• what happens to current as temperature increases?

  As the temperature increases, the ions in the metal vibrate faster , making it harder for the electrons to pass
• what does an LDR do?

  In bright lights, the resistance lowers so that a lot of current can flow through
• What do thermistors do?

  They are dependent on temperature, therefore , when the temperature is high, the resistance decreases
• What is the formula for charge?

  Q=IT
• The formula for energy in power?

  E=PT
• formula for energy IN VOLTAGE?

  E=vct
• what is the formula for energy in charge?

  E=QV
• Formula for power?

  p=IV