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Question

Select the incorrect statement :

(a) A machine always has the efficiency less than 100%.

(b) The mechanical advantage of a machine can be less than 1.

(c) A machine can be used as a speed multiplier.

(d) A machine can have the mechanical advantage greater than the velocity ratio.


Solution

Option (d) is incorrect. A machine can't have the mechanical advantage greater than the velocity ratio.

η=M.A.V.R. whose value is less than 1 in practical life.


Physics
Concise Physics
Standard X

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