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ICSE Class 10 Physics 2013 Paper
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Question : 9 of 70
Marks:
+1,
-0
In what way does an 'Ideal machine' differ from a 'Practical machine'?
Solution:
The efficiency of an ideal machine (free from friction etc) is equal to 1 . i.e. efficiency. But in practical machine, the efficiency is less than 1 due to the energy loss in friction.
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