Dimensional Analysis

1. Dimensional Formula of work is

• [ML 2 T -2 A -1]
• [ML T-2A-2]
• [ML- 2 T -2A -3]
• [ML 2 T -2]

2. The Dimension of universal gas constant is

• [ML2 T-2K -1]
• [M2L T-2K]
• [ML3 T-1K-1]
• none of these

3. Momentum per unit volume has dimension

• [ML T-1]
• [MLT-2]
• [ML-2 T-1]
• none of these

4. A Physical quantity is represented completely by

• Its magnitude only
• its unit only
• its magnitude as well as unit
• neither magnitude nor unit but its direction

5. Gaussian System of unit is also called as

• SI system
• MKS System
• FPS System
• CGS system

6. Which of the following fundamental units

• Newton
• Pascal
• Tesla
• Ampere

7. Length Cannot be measured by

• Fermi
• debye
• micron
• light year

8. Convert 20J into erg by dimension method

• 20x10 7 erg
• 2 x10 7 erg
• 20x10 6 erg
• 20x10 9 erg

9. Check whether the following equation is dimensionally correct or not h=2Tcosθ/rdg , where h is the height of liquid , T is surface tension of liquid , r is the radius of tube , d is density of liquid and g is acceleration due to gravity

• correct
• Incorrect
• not sure
• none of these

Name the principle used to check the correctness of an equation