Q11. If the vernier scale lies left of the zero of main scale the error is called______.

Q12. 1 kilowatt =______watt.

Q13. C.G.S. unit of energy is_________.

Q14. Watt is unit of__________.

Q15. 1 erg =________ KJ.

Q16. External diameter of a hollow cylinder can be measured with___________.

Q17. Which one of the following is derived quantity?

Q18. 1 A.U. =__________m.

Q19. In the measurement by instrument, the term called LC is the short name of the______

Q20. Which of the following instrument is used to measure thickness of thin wire?