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- 1. Multiple Choice
An electric kettle is commonly used to heat up water at home. The heating element used is nichrome wire and not copper. Which of the following reasons best explains why nichrome is used instead of copper?
Nichrome conducts more current than copper, so more heat can be generated.
Nichrome has higher resistance than copper, so more heat can be generated.
Nichrome has higher voltage than copper, so more heat can be generated.
Nichrome are cheaper than copper, so it is more economical.
- 2. Multiple Choicethe type of current that is used in mains electricityappealing currentdiverting currentalternating currentdirect current
- 3. Multiple Choicemeasure of powerwattohmvoltamp
- 4. Multiple ChoiceWhat is the power of a 20V bulb with 5A through it?100W100V6.3W6.3A
- 5. Multiple ChoiceWhat is the current through a 11V bulb with a power of 99W?9W9A60V60A
- 6. Multiple ChoiceA _________ is a plug or cartridge containing a strip of metal that melts when more than a specified amount of current passes through it.fusebreakercircuitpanel
- 7. Multiple Choice
Which wire is connected to a fuse in a plug?
Live
Neutral
Earth
Positive
- 8. Multiple Choice
Which one is a Fuse?
- 9. Multiple Choice
What is another Equation for Power?
Power = Potential Difference x Current
Power = Potential Difference / Current
Power = Current / Potential Difference
- 10. Multiple Choice
What are the Equations for Energy Transferred? Choose 2
Energy Transferred = Power x Time
Energy Transferred = Power / Time
Energy Transferred = Charge Flow x Potential Difference
Energy Transferred = Charge Flow / Potential Difference
- Answer choicesTagsAnswer choicesTags