Practice Energy And Power In Technology (2) - Physics in The Real World (Applications)

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9 questions

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5 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is electricity generation?
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Think about how power plants operate.
Question 2.
Define photovoltaic cells.
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They are crucial for solar panels.
3Question 3.
What is the main process for generating electricity in power plants?
- Converting heat to sound
- Converting mechanical energy to electrical energy
- Converting chemical energy to thermal energy
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Think about the role of turbines.
4Question 4.
True or False: Photovoltaic cells only work on sunny days.
- True
- False
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Consider the efficiency of solar technology.
Question 5.
A solar panel has a peak output of 300 watts under full sun conditions. If it operates at 80% efficiency due to cloud cover, what is its effective power output?
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Calculate efficiency as a percentage.
Question 6.
If a smartphone battery has a capacity of 3000 mAh and operates at 1A, how long will it last before needing a recharge?
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Convert milliamperes to amperes to simplify the calculation.

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