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3.2.1 to 3.2.2 Review

Quiz by Kwok Louie

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35 questions
Show answers
  • Q1
    According to Ohm's Law, what is the voltage across a resistor when the current through it is 5A and the resistance is 2Ω?
    5V
    10V
    12V
    7V
    30s
  • Q2
    What is the resistance when a current of 3A flows through a component with a voltage drop of 12V across it according to Ohm's Law?
    0.25Ω
    9Ω
    4Ω
    36Ω
    30s
  • Q3
    According to Ohm's Law, what is the power dissipated in a resistor with a resistance of 5Ω when 3A of current flows through it?
    45W
    15W
    60W
    30W
    30s
  • Q4
    What is the term used to describe a sudden, temporary reduction or loss of electricity in an area?
    Brownout
    Blackout
    Spike
    Surge
    30s
  • Q5
    What is the purpose of a backup generator during a power blackout?
    To shut down the electrical system
    To provide emergency power
    To prevent power surges
    To increase electricity demand
    30s
  • Q6
    What is the term used to describe a planned, temporary interruption of power to specific areas in order to balance the electricity supply and demand?
    Blackout
    Brownout
    Power surge
    Rolling blackout
    30s
  • Q7
    What protective measure can be taken to minimize the impact of a power blackout on critical infrastructure?
    Implementing backup power systems
    Ignoring the issue
    Reducing energy consumption
    Disconnecting electrical devices
    30s
  • Q8
    What is the most common cause of a power blackout in a residential area?
    Faulty power lines or equipment
    Natural disasters
    Excessive electricity usage
    Cyber attacks
    30s
  • Q9
    What is the term for a localized power outage affecting a small number of customers?
    Blackout
    Rolling blackout
    Microgrid
    Brownout
    30s
  • Q10
    Which equipment is used to protect electrical circuits from power surges during a blackout?
    Fuse
    Surge protector
    Transformer
    Battery backup
    30s
  • Q11
    What is one common effect of voltage surges on electronic devices?
    Extended battery life
    Improved processing speed
    Enhanced data storage capacity
    Damage to sensitive components
    30s
  • Q12
    How can voltage sags affect sensitive electronic equipment?
    Enhance data transfer speed
    Reduce energy consumption
    Cause equipment malfunction or failure
    Improve equipment performance
    30s
  • Q13
    Which of the following is a potential consequence of noise and poor quality power in electrical systems?
    Interference with communication systems
    All of the above
    Malfunctioning of sensitive electronic devices
    Increased heating of equipment
    30s
  • Q14
    How can power spikes impact electronic devices?
    They have no impact on the devices
    They extend the lifespan of the devices
    They can cause damage to the devices by exceeding their voltage tolerance
    They improve the performance of the devices
    30s
  • Q15
    What protective measure can be used to safeguard electronic devices from power spikes?
    Unplugging the devices during storms
    Using outdated adapters
    Using surge protectors
    Increasing the power supply
    30s

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