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Work, Power And Energy — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceWork, Power And Energy1 Mark
MCQ
When the time taken to complete a given amount of work increases, then:
  • A
    Power generated increases
  • ✓
    Power generated decreases
  • C
    Energy increases
  • D
    Energy decreases
✓

Answer

Correct option: B.
Power generated decreases
Power is the rate of energy generation $($or absorption$).$
The relation between time and power is ${ P} = \frac{E}{t}.$
So power and time are inversely proportional to each other. Hence when the time to complete a given amount of work increases then the power generated decreases.

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