Circuit symbols + Current and charge

• Charge is measured in?

  Coulombs (C)
• What is the word equation to calculate charge?

  Charge = current x time
• What is the symbol for Charge?

  Q
• What is the symbol for Current?

  I
• What is the symbol for time?

  t
• What is time measured in?

  Seconds
• What is current measured in?

  Amperes (A)
• Name them.

  A) Open switch

  B) Closed switch

  C) Lamp

  D) Voltmeter

  E) Ammeter

  F) Resistor

  G) LDR

  H) Thermistor

  I) Variable resistor

  J) Diode

  K) LED

  L) Fuse

  M) Cell

  N) Battery

  
• A switch used to turn a circuit on (closed) and off (open).
• a lamp is a

  n electrical current heats the filament in a bulb so that it gives out light.
• How do you calculate potential difference using the word equation?

  potential difference = energy/charge
• What is the symbol equation to calculate potential difference?

  V = E/Q
• • potential difference (V) is measured in volts (V)
• energy (E) is measured in joules (J)
• charge (Q) is measured in coulombs (C)
• What is current?

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

  Resistance is everything that resists the flow of electrons in a circuit