NCERT Exemplar Questions

Unspecified year 10 questions

1. The number of significant figures in 0.06900 is
2. The sum of the numbers 436.32, 227.2 and 0.301 in appropriate significant figures is
3. The mass and volume of a body are 4.237g and $2.5cm^{3}$, respectively. The density of the material of the body in correct significant figures is
4. The numbers 2.745 and 2.735 on rounding off to 3 significant figures will give
5. The length and breadth of a rectangular sheet are $16.2 \pm 0.1cm$ and $10.1 \pm 0.1cm$, respectively. The area of the sheet in appropriate significant figures and error is
6. Which of the following pairs of physical quantities does not have same dimensional formula?
7. Measure of two quantities along with the precision of respective measuring instrument is $A = 2.5ms^{-1} \pm 0.5ms^{-1}$, $B = 0.10s \pm 0.01s$. The value of AB will be
8. You measure two quantities as $A = 1.0m \pm 0.2m$, $B = 2.0m \pm 0.2m$. We should report correct value for $\sqrt{AB}$ as
9. Young's modulus of steel is $1.9 \times 10^{11}N/m^{2}$. When expressed in CGS units of $\text{dyne} /cm^{2}$, it will be equal to ($1N = 10^{5} \text{dyne}$, $1m^{2} = 10^{4}cm^{2}$ )
10. If momentum (p), area (A) and time (T) are taken to be fundamental quantities, then energy has the dimensional formula