Neet PYQ 2007

Assuming the sun to have a spherical outer surface of radius $r$, radiating like a black body at temperature $t{}^{\circ }\text{C}$, the power received by a unit surface, (normal to the incident rays) at a distance $R$ from the centre of the sun is:

A particle starting from the origin $(0,0)$ moves in a straight line in the $(x,y)$ plane. Its coordinates at a later time are $(\sqrt{3},3)$. The path of the particle makes with the $x$ -axis an angle of:

If the ${}_{13}^{27}\text{Al}$ nucleus has a nuclear radius of about $3.6\text{fermi}$, then ${}_{52}^{125}\text{Te}$ would have its radius approximately as:

A wheel has an angular acceleration of $3.0{\text{rad/s}}^2$ and an initial angular speed of $2.00\text{rad/s}$. In a time of $2\text{s}$, it has rotated through an angle (in radian) of:

The resistance of an ammeter is $13\Omega$ and its scale is graduated for a current up to $100\text{A}$. After an additional shunt has been connected to this ammeter it becomes possible to measure currents up to $750\text{A}$ by this meter. The value of shunt resistance is: