Physics XI Karachi Board Fill in the Blanks - Five Year Papers

1. When a body is placed on an inclined frictionless plane, the force by which the body slides down is equal to __________.

2. In Michelson interferometer the movable mirror is moved__________ to produce a path difference of l/2.

3. The bending of light waves around the sharp corners of an obstacle is called __________. Of light.

4. The absolutely identical waves starting from the same point are said to be in __________.

5. If an object is placed at the focus of a convex lens, its image will be formed at __________.

6. In a compound microscope, the focal length of the eyepiece is __________ than the focal length of the objective.

7. The crystalline lens in human eye is __________.

8. Pinhole camera was designed by __________.

9. The basic unit of luminous intensity is __________.

10. Whenever the average and instantaneous velocities of a body are equal, the body is said to have __________ velocity.

11. The dimensions of acceleration are __________.

12. One radian is equal to __________.

13. The time rate of change of __________ is called angular acceleration.

14. For the translational equilibrium, the net force acting on the body must be equal to __________.

15. One Kilowatt hour (kWh) is equal to __________ joules.

16. Decibel is the unit of __________.

17. Sound waves, which have frequency more than 20,000Hz are, called __________.

18. Maxwell concluded that light waves are __________ in nature.

19. Interference of light can be explained on the basis of __________ theory of light.

20. If an object is placed at the focus of converging lens, its image will be formed at __________.

21. In a compound microscope, the eyepiece is used as __________.

22. Watt hour is the unit of __________.

23. The size of the image formed by a concave lens is always __________ than the size of the object.

24. The distance between two adjacent nodes is __________.

25. The velocity of sound waves in vacuum is __________.

26. Candela is the unit of __________.

27. An imaginary line about which a body rotates is called __________.

28. The torque acting on a particle is the time rate of change of its __________.

29. The ability of light waves to bend around the sharp edges of obstacles in their path is called __________.

30. A body is said to be in __________ equilibrium if the net force on it is zero.

31. The least distance of distinct vision for a normal eye is __________.

32. A vector in any given direction, whose magnitude is one is called __________.

33. The product of mass and velocity is called __________.

34. At maximum height the vertical velocity of a projectile is __________.

35. The physical quantity, which tends to rotate a body is called __________.

36. Einstein’s mass energy equation is __________.

37. In a telescope the focal length of the objective is __________ than the focal length of the eyepiece.

38. From the phenomenon of __________ it is proved that light waves are transverse.

39. The dimension of any physical quantity can always be expressed as some combination of the __________ quantities.

40. The force of attraction acts along the __________ joining the two interacting bodies.

41. Internationally recognized unit of loudness is __________.

42. The SI unit of momentum is __________.