1. SI unit of pressure is

a) Pascal

b) \[Dynes\diagup cm ^{2}\]

c) cm of Hg

d) Atmosphere

Explanation: SI unit of pressure is Pascal

2. The unit of angular acceleration in the SI system is

a) N K \[g ^{-1}\]

b) \[m s ^{-2}\]

c) rad \[s ^{-2}\]

d) m \[K g ^{-1}K\]

Explanation:

3. The unit of Stefan's constant \[\sigma\] is

a) \[W m ^{-2}K ^{-1}\]

b) \[W m ^{2}K ^{-4}\]

c) \[W m ^{-2}K ^{-4}\]

d) \[W m ^{-2}K ^{4}\]

Explanation:

4. Which of the following is not a unit of energy

a) \[W-s \]

b) \[kg-m \diagup sec\]

c) \[N-m \]

d) Joule

Explanation: Kg-m/sec is the unit of linear momentum

5. In \[S=a+bt+ct^{2}\] . S is measured in metres and t in seconds. The unit of c is

a) None

b) m

c) \[ms^{-1}\]

d) \[ms^{-2}\]

Explanation: ct

^{2}must have dimensions of L

c must have dimensions of L/T

^{2}i.e. LT

^{-2}

6. Joule-second is the unit of

a) Work

b) Momentum

c) Pressure

d) Angular momentum

Explanation:

i.e. the unit of angular momentum is joule-second.

7. Unit of energy in SI system is

a) Erg

b) Calorie

c) Joule

d) Electron volt

Explanation: Unit of energy in SI system is Joule

8. A cube has numerically equal volume and surface area. The volume of such a cube is

a) 216 units

b) 1000 units

c) 2000 units

d) 3000 units

Explanation:

9. Wavelength of ray of light is 0.00006 m . It is equal to

a) 6 microns

b) 60 microns

c) 600 microns

d) 0.6 microns

Explanation: 6 * 10

^{-5}= 60 * 10

^{-6}= 60 microns

10. Electron volt is a unit of

a) Charge

b) Potential difference

c) Momentum

d) Energy

Explanation: Electron volt is a unit of Energy