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When does an elastic metal rod change it...

When does an elastic metal rod change its length?

A

falls vertically under its weight

B

is pulled along its length by a force acting at one end

C

rotates about an axis at one end

D

slides on a rough surface

Text Solution

Verified by Experts

The correct Answer is:
B, C
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Knowledge Check

  • An elastic metal rod will change its length when it

    A
    falls vertically under its weight
    B
    is pulled along its length by a force acting at one end
    C
    rotates about an axis at one end
    D
    slides on a rough surface

  • Identify the case when an elastic metal rod does not undergo elongation

    A
    it is pulled with a constant acceleration on a smooth horizontal surface
    B
    it is pulled with constant acceleration on a smooth horizontal surface
    C
    it is allowed to fall freely
    D
    All of the above

  • The fundamental radio antenna is a metal rod which has a length equal to

    A
    `lamdba` in free space at the frequency of operation
    B
    `omega//2` in free space at the frequency of operation
    C
    `lambda//4` in free space at the frequency of operation
    D
    `3 lambda//4` in free space at the frequency of operation

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