- Home
- Standard 11
- Physics
3-1.Vectors
medium
સદિશ $\overrightarrow a $ ને $d\theta $ખૂણે ફેરવતાં $|\Delta \overrightarrow a |$ અને $\Delta a$ મેળવો.
A
$0,\,a\,d\theta $
B
$a\,d\theta ,\,0\,$
C
$0, 0$
D
એકપણ નહિ
Solution
$|\overrightarrow {OA} |\, = a$
$|\overrightarrow {OB} |\, = a$
$\overrightarrow {OB} – \overrightarrow {OA} = \overrightarrow {AB} = \Delta \overrightarrow {a\,} $ $ \Rightarrow \,\,\,|\Delta \overrightarrow {a\,} |\, = AB$
$AB = a . d\theta $
$|\Delta \overrightarrow {a\,} |\, = \,a\,d\theta $
$|\overrightarrow {OB} | – |\overrightarrow {OA} |$ $ \Rightarrow \,\,\,a – a = 0$
$\Delta a = 0$
Standard 11
Physics
