Download App

Units and Measurements — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysicsUnits and Measurements2 Marks
Question
Calculate the solid angle subtended by the periphery of an area of $1cm^2$ at a point situated symmetrically at a distance of 5cm from the area.
✓

Answer

Solid angle, $\Omega=\frac{\text{Area}}{(\text{Radial distance})^2}$$=\frac{1\text{cm}^2}{(5\text{cm})^2}=\frac{1}{25}=4\times10^{-2}\ \text{steradian}$
($\because$ Area = $1cm^2$, distance = $5cm$)

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "2 Marks Questions" from Units and Measurements→Units and Measurements — all question types→Physics STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Is neutral temperature always the arithmetic mean of inversion temperature and the temperature of the cold junction? Does the unit of temperature have an effect in deciding this question?
→
Find the angle of projection at which horizontal range and maximum height are equal.
→
Define Escape velocity and find its value.
→
Lithium (Z = 3) has two stable isotopes $^6Li$ and $^7Li$. When neutrons are bombarded on lithium sample, electrons and $\alpha$-particles are ejected. Write down the nuclear process taking place.
→
Draw a graph showing the variation of potential energy and kinetic energy with respect to height of a free fall under gravitational force.
→
If the sum and difference of two vector $\vec{A}$ and $\vec{B}$ are perpendicular to each other then prove that two vectors are equal in magnitude.
→
What is the difference between head-on collision and glancing collision? Define coefficient of restitution.
→
Can you ever have a situation in which a light ray goes undeviated through a prism?
→
On a hot summer day we want to cool our room by opening the refrigerator door and closing all the windows and doors. Will the process work ?
→
At what temperatures ($in ^oC$) will the speed of sound in air be 3 times its value at $O^oC$?
→