Question

answer the questions appropriately​

Answer 1

$\huge\mathbb{★}\mathbb\orange{A}\mathbb\pink{N}\mathbb\blue{S}\mathbb\purple{W}\mathbb\green{E}\mathbb\red{R}$

$number \: of \: oscillation = 20$

$total \: time \: taken \: for \: 20 \: oscillation$

$= 25 \: sec$

$time \: period = 25/20 = 1.25 \: sec$

$least \: count \: of \: watch = 0.2 \: sec$

$the \: measurement \: of \: time \: period \: 1.25 \: sec$

$the \: measuring \: watch \: can \: measure$

$upto \: 0.2s \: thus \: the \: watch \: can \:$

$measure \: 0.2s \: but \: the \: uncertaimly$

$remains \: the \: 0.05 \: \: s.$

$1.25 \: s \: = 1.2 + 0.05$

$thus \: error \: = 0.05 \: sec$

$percentage \: error$

$= (0.05/1.25) \times 100 = 4\%$

$\large\mathcal\blue{HOPE \: IT'S \: HELPS \: YOU}$

$\huge\mathfrak\red{@FFdevansh}$