Physics
Assertion (A): The mechanical advantage of class III levers is always less than 1.
Reason (R): This is because the effort arm is always greater than the load arm.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true and R is not the correct explanation of A.
- assertion is false but reason is true.
- assertion is true but reason is false.
Machines
3 Likes
Answer
assertion is true but reason is false.
Explanation
Assertion (A) is true. Class III levers always have a mechanical advantage less than 1, indicating that the load force is greater than the effort force.
Reason (R) is false. In class III levers, the load arm is always longer than the effort arm. Therefore, the statement that the effort arm is always greater than the load arm is incorrect.
Answered By
1 Like
Related Questions
Assertion (A): 146C and 147N are isobars.
Reason (R): 146C has 6 protons and 8 neutrons in its nucleus, whereas 147N has 7 protons and 7 neutrons in its nucleus.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true and R is not the correct explanation of A.
- assertion is false but reason is true.
- assertion is true but reason is false.
Assertion (A): When a hammer is made to fall on a nail fixed upright on a wooden piece, the nail begins to penetrate the wood.
Reason (R): As the hammer starts falling, its kinetic energy begins to change into potential energy.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true and R is not the correct explanation of A.
- assertion is false but reason is true.
- assertion is true but reason is false.
Assertion (A): A fuse wire must have a high resistance and low melting point.
Reason (R): A fuse is only used for a small current flow.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true and R is not the correct explanation of A.
- assertion is false but reason is true.
- assertion is true but reason is false.
Assertion (A): The specific heat capacity of a substance is the amount of heat required to raise its temperature by 1°C.
Reason (R): The specific heat capacity of a substance is not its characteristic property.
- Both A and R are true.
- Both A and R are false.
- A is false but R is true.
- A is true but R is false.