Electricity

• What are the two ways a component can be connected in a circuit?

  Series and parallel
• How does the potential difference vary in series and parallel circuits?

  • Series: Total P.D is shared
  • Parallel: P.D across each component is the same
• What can be said about the total resistance of two resistors connected in parallel?

  It is less than the smallest resistance
• What can be said about the total resistance of two resistors connected in series?

  It is the sum of the two resistances
• How is the current described in a series circuit?

  The current is the same at all positions
• How is the current described in a parallel circuit?

  The current is shared between branches
• How should an ammeter be connected to measure current?

  In series with the component
• How should a voltmeter be connected to measure potential difference?

  In parallel to the component
• Why is it advantageous to connect lamps in parallel?

  Other lamps remain unaffected if one blows
• What are the two ways a component can be connected in a circuit?

  Series and parallel
• How is potential difference shared in a series circuit?

  Total P.D is shared between components
• How is potential difference across components in a parallel circuit?

  P.D across each component is the same
• What can be said about the total resistance of two resistors in parallel?

  Total resistance is less than the smallest resistance
• What can be said about the total resistance of two resistors in series?

  Total resistance is the sum of individual resistances
• How is the current described in a series circuit?

  The current is the same at all positions
• How should an ammeter be connected to measure current?

  Connected in series with the component
• How is the current described in a parallel circuit?

  The current is shared between different branches
• How should a voltmeter be connected to measure potential difference?

  Connected in parallel to the component
• Why is it advantageous to connect lamps in parallel?

  One lamp blowing does not affect others
• Cell


  What does this symbol represent?

  
• Battery


  What does this symbol represent?

  
• Lamp


  What does this symbol represent?

  
• Fuse


  What does this symbol represent?

  
• Voltmeter


  What does this symbol represent?

  
• Ammeter


  What does this symbol represent?

  
• Diode


  What does this symbol represent?

  
• Resistor


  What does this symbol represent?

  
• Thermistor


  What does this symbol represent?

  
• Variable Resistor


  What does this symbol represent?

  
• LDR


  What does this symbol represent?

  
• LED


  What does this symbol represent?

  
• Open switch


  What does this symbol represent?

  
• Closed switch


  What does this symbol represent?

  
• Fixed Resistor


  What does this graph represent?

  
• Filament lamp


  What does this graph represent?

  
• Diode


  What does this graph represent?

  
• Series circuit


  What kind of circuit is this?

  
• Parallel Circuit


  What kind of circuit is this?

  
• What must be true for electrical charge to flow?

  The circuit must be closed
• What is required for charge to flow in a circuit?

  There must be a source of potential difference