A) \[\frac{3}{2}\alpha \]
B) \[\frac{5}{2}\alpha \]
C) \[\frac{5}{3}\alpha \]
D) none of these
Correct Answer: C
Solution :
\[(3L){{\alpha }_{_{eff}}}\Delta \theta =L\alpha \Delta \theta +2L(2\alpha )(\Delta \theta )\] |
\[\therefore \] \[{{\alpha }_{eff}}=\frac{5}{3}\alpha \] |
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