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Q.

In a physical balance working on the principle of moments when 15mg weight is placed on the right pan, the beam becomes horizontal. Both the empty pans of balance are of same mass. Which of the following statements is true ?

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a

Both arms are of same length

b

Left arm is shorter than the right arm

c

Left arm is longer than the right arm

d

Weight of body using this balance appears lighter

answer is B.

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Detailed Solution

In order to balance the same weight there is a requirement to add weight on the right pan, hence left arm is longer than the right arm.

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