RP: factors that affect resistance

    Cards (18)

    • What is the main topic of the practical experiment described in the study material?
      Factors that affect resistance
    • What are the two types of electrical current mentioned?
      Direct and alternating current
    • What is the unit of resistance?
      Ohms
    • What does potential difference measure in a circuit?
      The energy given to the charge carriers
    • What is the formula to calculate resistance?
      R = V/I
    • If the potential difference is 10 V and the current is 2 A, what is the resistance?
      R=R =10 V2 A= \frac{10 \text{ V}}{2 \text{ A}} =5Ω 5 \Omega
    • What is the aim of the experiment described in the study material?
      • To investigate how changing the length of the wire affects its resistance.
    • What apparatus is used to measure electric current?
      Ammeter
    • What apparatus is used to measure potential difference?
      Voltmeter
    • How do you calculate resistance using voltage and current readings?
      By using the formula R=R =VI \frac{V}{I}
    • What is the relationship between the length of the wire and its resistance based on the experiment's results?
      • Resistance increases as the length of the wire increases.
      • Resistance is directly proportional to length.
    • What is the consequence of heating the resistance wire during the experiment?
      Burns to the skin
    • What control measures should be taken to avoid burns from the resistance wire?
      Do not touch the wire while the circuit is connected and allow it to cool.
    • What does the graph of resistance against length indicate?
      It shows that resistance is directly proportional to length.
    • What is the potential difference measured in?
      Volts (V)
    • What is the definition of electrical current?
      Moving electric charges, such as electrons moving through a metal wire.
    • What is the purpose of using crocodile clips in the experiment?
      To connect the resistance wire at specified lengths.
    • If the resistance of a wire is found to be 3 Ω at a length of 40 cm, what would you expect the resistance to be at 80 cm?
      Approximately 6 Ω, since resistance is directly proportional to length.
    See similar decks