The International System of Units

Unspecified year 26 questions

1. Which one of the following pairs of quantities and their units is a proper match?
2. One second is defined to be equal to
3. One yard in SI unit is equal to
4. One pico farad is equal to
5. 'Torr' is the unit of
6. Joule second is a unit of
7. The unit of the coefficient of viscosity in S.I. system is
8. The unit of the Stefan-Boltzmann's constant is
9. The wrong unit conversion among the following is
10. Unit of specific resistance is
11. Unit of magnetic moment is
12. Surface tension of a liquid is $70 \text{dyne}/cm$. Its value in SI is
13. For the given figure solid angle, $d\Omega$ is equal to
14. Which of the following represents incorrect unit?
15. Which of the following is the unit of molar gas constant?
16. The unit of permeability of free space, $\mu_{0}$ is
17. The numerical values of young's modulus in S.I. unit is $\beta$. What is its numerical value in cgs system?
18. In the eqn. $(P + a/V^{2})(V - b)$ = constant, the unit of a is
19. In equation, $r = m^{2}\sin \pi t$, where t represents time. If the unit of m is N, then the unit of r is
20. If $x = at + bt^{2}$, where x is the distance travelled by the body in kilometers while t is the time in seconds, then the unit of b is
21. The unit of permittivity of free space, $\varepsilon_{o}$ is
22. The electric field is given by $\vec{E} = (A/x^{3})\hat{i} + By\hat{j} + Cz^{2}\hat{k}$. The SI units of A, B and C are respectively: [where x, y and z are in m ]
23. E, m, J and G denote energy, mass, angular momentum and gravitational constant respectively, then the unit of $(EJ^{2})/(m^{5}G^{2})$ is
24. Velocity (v) and acceleration (a) in two systems of units 1 and 2 are related as $v_{2} = (n/m^{2})v_{1}$ and $a_{2} = (a_{1}/mn)$ respectively. Here m and n are constants. The relations for distance and time in two systems respectively are:
25. If unit of length and force are increased 4 times. The unit of energy
26. The density of a material in CGS system of units is $4g/cm^{3}$. In a system of units in which unit of length is 10cm and unit of mass is 100g, the value of density of material will be