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A rod of length `l` and radius `r` is joined to a rod of length `l//2` and radius `r//2` of same material. The free end of small rod is fixed to a rigid base and the free end of larger rod is given a twist of `theta^(@)`, the twist angle at the joint will beA. `theta//4`B. `theta//2`C. `5 theta//6`D. `8 theta//9`

Answer» Correct Answer - D


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