Electricity and circuits

    Cards (20)

    • What is a diode?
      A non-ohmic conductor with higher resistance in one direction than the other
    • How does a charged object create an electric field?
      It creates a non-contact force on any other charged object in the field
    • What are electrons?
      Tiny negatively charged particles that move around the nucleus of an atom
    • What is an ion?

      A charged atom or molecule
    • What is a light-dependent resistor (LDR)?
      A resistor whose resistance depends on the intensity of the light incident on it
    • What is a light-emitting diode (LED)?
      A diode that emits light when it conducts
    • What are neutrons?

      Uncharged particles of the same mass as protons
    • What does Ohm's law state?
      The current through a resistor at constant temperature is directly proportional to the potential difference across the resistor
    • What does the term "parallel" refer to in a circuit?
      Components connected so that the potential difference is the same across each one
    • What is potential difference?
      A measure of the work done or energy transferred to the lamp by each coulomb of charge that passes through it
    • What is the unit of potential difference?
      The volt (V)
    • How is resistance calculated?
      Resistance (in ohms, Ω) = potential difference (in volts, V) ÷ current (in amperes, A)
    • What does "series" mean in a circuit?
      Components connected in a circuit so that the same current passes through them
    • What is static electricity?
      Electric charge stored on insulated objects
    • What is a thermistor?
      A resistor whose resistance depends on the temperature of the thermistor
    • What are the key characteristics of a diode?
      • Non-ohmic conductor
      • Higher resistance in reverse direction
      • Lower resistance in forward direction
    • What is the relationship between current and potential difference according to Ohm's law?
      • Current is directly proportional to potential difference
      • Applies at constant temperature
    • What are the differences between series and parallel circuits?
      Series:
      • Same current through all components
      • Potential difference divides among components

      Parallel:
      • Same potential difference across all components
      • Current divides among components
    • A series circuit is when the components are connected one after another
    • A parallel circuit is a closed circuit where the current splits into two or more paths before recombining to complete the circuit.
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