Fill in the Blanks1. The distance covered by an object in a ……………….. is called its speed.2. Time between one sunrise and the next sunrise was called a ……………….. .3. In a simple pendulum, the metallic ball suspended by thread is called its ……………….. .4. Time period of a pendulum depends on its ……………….. .5. Motion of objects can be represented in the pictorial form by their ……………….. graph.6. The distance-time graph for the motion of an object moving with a constant speed is a ………………..7. A weight hung from a string, used to measure time period is ______________.8. The rest position of pendulum is called ________________.9. ____________ is the S.I unit of Time period.10. The time taken to complete one oscillation is_______________.11. ____________ and ____________ are two factors on which Time period of simple pendulum depends.12. 1 microsecond = __________ second.13. 1 nanosecond =______________ second. 1 miilisecond = ______________ second.14. 1 millenium =____________ years.15. ________________ is the triangular metal plate which is used in sun dial.16. The metallic ball used in the pendulum is called__________________.17. A diagram showing relationship between two variable a quantities each measured along one of a pairof axes is called____________________________18. A substance whose crystals can vibrate very fast and a very precise rate is called _________.19. An instrument showing the time by the shadow of a pointer cast by the sun on to a graduated plate iscalled_____________.20. __________________ is a clock based on the principle of falling sand.21. _________________ is an instrument which measures the distance travelled by a body.22. Which of the two clock requires electric cell – quartz clock or sundial? _____________.23. Two physical quantities required to calculate speed are ____________ and ___________.24. ________________ effect of electric current is utilized in working of electric bell.25. ________________ effect of current is involved in functioning of electric bulb.26. ____________ and ____________ are two factors on which Time period of simple pendulum depends.27. _______________, _______________ and ________________ are the three factors on which heatproduced in a circuit depends.28. Full form of MCB is __________________________________.29. A conductor with high resistance is called ___________.30. _______________ is the triangular metal plate which is used in sun dial.