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WB JEE 2016
MCQ (Single Correct Answer)
+1
-0.25
Time period T of a simple pendulum of length l is given by $$T = 2\pi \sqrt {{l \over g}} $$. If the length is increased by 2%, then an approximate change in the time period is
A
2%
B
1%
C
$${1 \over 2}$$%
D
None of these
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