PHY 102 CBT PRACTICE

1. Two point charges 1C and -1C are placed 5mm away from each other forming a dipole. What will be the field intensity at a point 15cm away from the dipole on its axis?

2. Copy - The unit of Electric flux is ____

3. The proton and Neutron occupy the center of the atom system and are referred as the ______

4. All of these are type of resistors except ____

5. The unit of Electric flux is ____

6. Electric dipole moment p is described as ____

7. ___states that the total electric flux out of a closed surface is equal to the charge enclosed divided by permittivity

8. Copy - Three cells of emf 3V and internal resistance of 0.6 are connected in parallel in order to reduce the potential difference across the circuit. Calculate the effective internal resistance of the cell ?

9. The distance between two nearest crests or troughs is called ____

10. The electric potential difference between the ground and a cloud in a particular thunderstorm is 1.2 x 10 ^9 V. What is the magnitude of the change in energy (in multiples of the electron-volt) of an electron that moves between the ground and the cloud?

11. A point charge of magnitude 2uC is moved through a distance of 0.02m against uniform field of intensity 25Vm^-1. Calculate the word done on the charge

12. The algebraic sum of all the electric charges in any closed system is _____

13. Audio and radio signals carried on electrical wires are examples of ___

14. The relationship between the voltage (v) , resistance (R), and the current (I) is V=IR ; this is known as ____

15. A uniform electric field of magnitude E=100N/C exists in the space in X-direction. Using the Gauss theorem calculate the flux of this field through a plane square area of edge 10cm placed in the Y-Z plane

16. _____is defined as an imaginary line drawn in such a way that the direction of its tangent at any point is the same as the direction of the electric field vector E at that point

17. The structure of atoms can be described in terms of three particles from the option below except _____

18. One of about 100 basic materials that make up all matter.

19. An electron moves in the plane of this paper toward the top of the page. A magnetic field is also in the plane of the page and directed toward the right. The direction of the magnetic force on the electron is

20. Please fill answer below magnetic field lines coming out of the paper are indicated by

21. All of these are properties of conductors except ____

22. Two opposite and equal charges formed a dipole whose dipole moment is about [6.4 x 10^-24]cm.

calculate the maximum torque this dipole would experience in an electric field of [3.2 x10^6]NC^-1

23. The electric field at a point on the perpendicular bisector of a dipole is directed?

24. A uniform electric field of 1000N/C points to the left as shown.

what is the difference in potential (VB-VC) between points B and C ?

25. Copy - Factors that affect the resistance of a wire include all except _____

26. The region of space in which a charge would be acted upon by an electric force is _____

27. Factors that affect the resistance of a wire include all except _____

28. The electron and proton of a hydrogen atom are separated by a distance of [5.3 x 10^ -11]m, find the magnitude of the electric force between the two particles

29. Protons have magnitudes of charge ____

30. The smallest particle of an element is known as an:

31. A charged particle moves with velocity v in a magnetic field B. The magnetic force on the particle is a maximum when v is zero

32. The magnitude of the electric force between two points charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.

The law above satisfies _____

33. _____ is the unidirectional flow(one way) of electric charge, or a system in which the movement of electric charge is in one direction only

34. A uniform electric field of 1000N/C points to the left as shown.

what is the difference in potential (VC-VA) between points C and A ?

35. If a 100W light bulb is on for two hours each day, and energy costs 0.10perkW-h , how much does it cost to run the bulb for a month?

36. Two point charges 1C and -1C are placed 5mm away from each other forming a dipole. What will be the field intensity at a point 15cm away from the dipole on its axis?

37. Copy - Audio and radio signals carried on electrical wires are examples of ___

38. Two capacitors ( 0.30 and 0.5 uF ) are connected in parallel. What is their equivalent capacitance?

39. _____is a circuit in which the resistors are arranged with their heads connected together,and their tails connected together

40. It’s clear that the masses of the proton and neutron are nearly the same while the electron is about _____

41. Mass of Proton equals ______

42. A pair of point charges with equal magnitude and opposite sign (a positive charge q and a negative charge -q) separated by a distance d is called _____

43. If two magnets were in this order: NS SN they would:

44. _____don’t  let electrons move around within the materials freely

45. Electric current is measured using a device called ____

46. Factors affecting capacitance include all except ___

47. Any magnet has two ends, each one called a:

48. Three cells of emf 3V and internal resistance of 0.6 are connected in parallel in order to reduce the potential difference across the circuit. Calculate the effective internal resistance of the cell ?

49. The number of vibrations or disturbance produced in one second (unit time) is called ____

50. Charge is denoted as ____