Question

SECTION - A
School/Board Exam. Type Questions
Very Short Answer Type Questions
1. Name two derived quantities.
2. Express 1 N in CGS system
3. Express 1 J in CGS system,
4. What unit does a relative error in a measurement have?
5. Is it possible that a dimensionless quantity has unit?
6. How many zeroes appearing in the number 0.0040500, are significant?
7. What error does a vernier callipers have when zero mark of vernier scale does not coincide with zero mark of
main scale?
8. Write the dimensional formula for power.
9. Round off the number 9.8953 to three significant figures.
10. Write 623.5 cm in scientific notation, and its order of magnitude.
Short Answer Type Questions :
11. What is the relation between 1 AU and 1 parsec?
12. Name various instruments and methods used to estimate very small distances.
13. What principle is used in a mass spectrograph to estimate the mass of a charged particle?
14. What do you mean by parallax angle?​

Answer 1

Answer:

1. Weight, Area

2. 10^-5 Dyne