Components

• What do we need to know in order to draw circuit diagrams?

  We need to know what the different components do and the symbols that represent them.
• What is the purpose of a cell or battery in a circuit?

  They provide electric power to the circuit.
• How does a switch function in a circuit?

  A switch can be closed to allow electricity to flow or opened to turn off the circuit.
• What is a filament lamp?

  A filament lamp is a small bulb used in circuits.
• What is the function of a fuse in a circuit?

  A fuse breaks if too much current flows through the circuit.
• What is the purpose of a diode in a circuit?

  A diode only allows current to flow in one direction.
• What is a light emitting diode (LED)?

  An LED emits light when current flows through it in the forward direction.
• Where are LEDs commonly used?

  They are used in alarm clocks, traffic lights, and new LED bulbs.
• What is the function of an ammeter in a circuit?

  An ammeter measures current and is connected in series.
• What does a voltmeter measure in a circuit?

  A voltmeter measures potential difference and is added in parallel.
• What are the types of resistors mentioned in the material?

  • Basic resistors (fixed and variable)
  • Light dependent resistors (LDRs)
  • Thermistors
• What is the function of a basic resistor in a circuit?

  A basic resistor provides a certain number of ohms worth of resistance.
• What is a variable resistor?

  A variable resistor allows us to easily modify the amount of resistance it provides.
• How does an LDR function in different light conditions?

  An LDR's resistance is low in bright light and high in darkness.
• In what applications are LDRs commonly used?

  They are used in automatic night lights and burglar alarms.
• How does the resistance of a thermistor change with temperature?

  Higher temperatures cause the resistance of a thermistor to fall, while lower temperatures increase it.
• Where are thermistors commonly used?

  They are used as temperature receptors in car engines and electronic thermostats.
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• Why are circuit diagrams important in understanding electrical circuits?

  They provide a visual representation of the components and their connections.
• What is the role of current in circuit operation?

  Current is the flow of electric charge that powers the circuit's components.
• What is the significance of resistance in electrical circuits?

  Resistance limits the flow of current in the circuit.
• How does light intensity affect the resistance of an LDR?

  Higher light intensity results in lower resistance in an LDR.
• How does temperature affect the resistance of a thermistor?

  Higher temperatures cause the resistance of a thermistor to decrease.