A transverse wave is moving along a string. The linear density of a vibrating string is $2 \times 10^{-3} \mathrm{~kg} / \mathrm{m}$. The wave equation is $y=0.02 \sin (2 x+10 t) m$. The tension in the string is
$2 \times 10^{-2} \mathrm{~N}$
$5 \times 10^{-2} \mathrm{~N}$
$2 \times 10^{-3} \mathrm{~N}$
$5 \times 10^{-3} \mathrm{~N}$
Out of the following properties describing diamagnetism, identify the property which is "WRONG"
Diamagnetic materials possess no net magnetic dipole moment.
Diamagnetic materials are repelled by a magnet.
When placed in external magnetic field diamagnetic materials move from stronger to weaker part of magnetic field.
The magnetic susceptibility of diamagnetic materials is positive.
In Young's double slit experiment, waves from slits ' $\mathrm{S}_1$ ' and ' $\mathrm{S}_2$ ' have a path difference of $\frac{\lambda}{4}$ and $\frac{\lambda}{6}$ respectively at points $x$ and $y$ on the screen. The ratio of intensities at points $y$ to that at $x$ is $\left(\cos 45^{\circ}=\frac{1}{\sqrt{2}}, \cos 30^{\circ}=\sqrt{3} / 2,\right)$
$1: 3$
$3: 2$
$3: 4$
$2: 3$
The angular separation between the minute hand and the hour hand of clock 40 minutes passed after $12 \mathrm{p} . \mathrm{m}$. is
$120^{\circ}$
$110^{\circ}$
$90^{\circ}$
$220^{\circ}$
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