A to Z of Physics

29/12/2008

Multiple choice questions – Units&Dimensions.

Filed under: Physics Dimensions, Physics Units — gyaunnrraje @ 5:01 pm
Tags:

1 . 1KWH is  unit of

Ans : 1.Time 2. Power 3. Energy 4. Stress

2. Unit of  Intensity of magnetic induction field  is

Ans : 1.N/Am  2. Tesla   3.Wb/m^{2}    4. All above

3. Which of the following has no units?

Ans : 1. Thermal capacity    2. Magnetic susceptibility 3. Angular acceleration 4. Moment of a mangnet

4.Which one of the following units is a fundamental unit?

Ans : 1. watt   2. joule/sec  3. ampere 4. newton

5. 10^5 Fermi is equal to

Ans : 1. 1 meter      2. 100  micron      3.   1angstrom unit 4. 1 mm

6. kg m/sec is the unit of

Ans : 1. Impulse 2. Angular acceleration 3 . Capacity of condenser   4. Acceleration.

7. candela is the unit of

Ans : 1. Magnetic flux   2. Intensity of electric field    3. Luminous intensity 4. Charge

8. If  10 newton = X dynes, the value of  x is

Ans : 1. 10^6 2.10^4 3.10^8          4.10^3

9. 1 KWh is equal to

Ans : 1. 360 J    2. 1800 J   3.1800\times10^5J 4. 360\times10^5J

10. Which of the following is a common unit of a physical quantity in M.K.S & S.I systems.

Ans : 1. ampere  2.kelvin   3. mole  4. joule/sec

11. The fundamental unit which is common in F.P.S and M.K.S systems is

Ans : 1.  foot      2. sec 3. kilo gram       4. pound

12. Which of the following is Unit of   length?

Ans 1. Lunar Month      2. Kelvin         3. candela       4. Light year

13. Boltzman’s constant and planck’s constant differ in the dimensions of

Ans : 1. Time and temperature 2. Mass and temperature    3. Length and mass    4. Length and time .

14. Magnetic induction and magnetic flux differ in the dimensions of

Ans : 1 Time   2. Mass  3.Electric current 4.Length

15.Which of the following is a fundamental quantity in M.K.S and C.G.S systems.

16 . rad / sec is the unit of

Ans : 1.Angular displacement     2. Angular velocity 3. Angular acceleration   4. Angular momentum .

17 . The ratio of S.I unit of  K.E to C.G.S unit of   K.E  is

Ans : 1. 10^7     2. 10^{-7}     3. 10^{-5}    4. 10^5

18. If u_1 and u_2 are the units of a physical quantity and n_1  ‘ n_1 are the numerical values, then

Ans : 1. \frac{n_1}{n_2} =\frac{u_1}{u_2}        2. \frac{n_2}{n_1} =\frac{u_1}{u_2}  3.\frac{n_1}{n_2}^2 =\frac{u_1}{u_2} 4. None of the above

19. which one of the following is the unit of energy.

Ans : 1. newton   2. N/sec   3. N – sec   4.None of the above

20. Which of the following  is not  a unit of power .

Ans :  1. Watt     2. joule/hr   3. Nm/sec    4. N/sec

21 . The physical quantity having units of mass is

Ans:  1. Density     2. Momentum       3. Inertia 4.  Moment of force


No Comments Yet »

No comments yet.

RSS feed for comments on this post. TrackBack URI

Leave a comment

Blog at WordPress.com.