PHYSICS
JAMB 2021 - Question 10
Physics 2021 JAMB Past Questions - Question 10: What is the correct formular for the efficiency of a device?
Choose the correct answers from the options given.
A:
B:
C:
D:
Correct Answer
D
Explanation
The efficiency (\( \eta \)) of a device is typically calculated using the formula:
\[ \eta = \frac{\text{Useful energy output}}{\text{Total energy input}} \times 100\% \]
This formula gives the efficiency as a percentage, showing how much of the input energy is converted into useful output.
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