Question

If the length of the pendulum in pendulum clock increases by 0.1%, then the error in time per day is:

(1) 86.4 s

(2) 4.32 s

(3) 43.2 s

(4) 8.64 s

Comments

How T= 2π√l/g changes into ∆t/t=1/2×∆l/l

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T = (2pi/√g)√l
Here (2pi/√g) is constant and let k
So, T = k(l)^1/2
ΔT/T = 1/2 Δl/l

Answer 1

Correct Option is (3) 43.2 s

Comments

0.1 ke neeche 100 kyun lagaya

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0.1 Percent hai na isliye

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% hai to vo multiply me aana chahiye, neeche kyu aaya?

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(Δl/l x 100) = 0.1%