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which of the following is wrong?...

which of the following is wrong?

A

`I^(st)` order lever `:MAgt1`

B

`II^(nd)` order lever `:MAgt1`

C

`III^(rd)` order lever `:MAgt1`

D

single-fixed pullery `:MA=1`

Text Solution

Verified by Experts

The correct Answer is:
C
In case III order lever always the load arm will be greater than the effort arm. Mechanical advantage is inversely propotional to the load arm therefore it will be always less than 1.
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PEARSON IIT JEE FOUNDATION-THE MACHANISM OF MACHINES-VERY SHORT ANSWER TYPE QUSETIONS
  1. Work done by a machine equals to .

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  2. A rod which is free to move around a point is called.

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  3. See-saw is an example of order lever.

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  4. If the mechanical advantage of a lever is equal to 1, then the effort ...

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  5. If the slope of an inclined plane is steeper, the effort required to p...

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  6. If MA of a simple machine is greater than 1, then effort arm is than ...

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  7. For order lever, mechanical advantage (MA) is always greater than 1.

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  8. For a single movable pulley, MA is .

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  9. Forceps are an example of order lever.

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  10. If mechanical advantages of two inclined planes A and B are in the rat...

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  11. If the effort arm of a lever is twice of its load arm, it is a .

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  12. Name a machine which can be used to : change the direction of force ...

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  13. which of the following is wrong?

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  14. Which of the following planes cannot be used to push load to a certain...

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  15. If load is between the fulcrum and effort of a lever, it is called or...

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  16. Efficiency of an ideal machine is .

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  17. Which of the following is an example of wedge?

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  18. Ghat road is an example of

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  19. What is the principle used in wheel and axle? Mention its applications...

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  20. Regular oiling of parts increases their

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