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Assertion: soldiers are asked to break s...

Assertion: soldiers are asked to break steps while crossing the bridge.
Reason: The frequency of marching may be equal to the natural frequency of bridge and may lead to resonance which can break the bridge.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of the assertion.

C

If assertion is true but reason is false.

D

If the assertion and reason both are false

Text Solution

Verified by Experts

The correct Answer is:
A
If the soldiers while crossing a suspended bridge march in steps, the frequency of marching steps of soldiers may match with the natural frequency of oscillations of the suspended bridge. In that situation resonance will take place, then the amplitude of oscillation of the suspended bridge will increase enormously, which may cause the collapsing of the bridge. To avoid such situations the soldiers are advised to break steps on suspended bridge.
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