PHY 102 CBT PRACTICE

1. 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 ?

2. 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 _____

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

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

5. All of these are type of resistors except ____

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

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

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

9. Protons have magnitudes of charge ____

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

11. Factors affecting capacitance include all except ___

12. 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 ?

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

14. 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

15. Charge is denoted as ____

16. 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?

17. All of these are properties of conductors except ____

18. _____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

19. 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 ?

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

21. 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

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

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

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

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

26. 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?

27. 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

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

29. 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?

30. Electric dipole moment p is described as ____

31. 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?

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

33. 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 ?

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

35. 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

36. Electric current is measured using a device called ____

37. The unit of Electric flux is ____

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

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

40. Copy - The unit of Electric flux is ____

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

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

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

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

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

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

47. 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 _____

48. 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

49. Mass of Proton equals ______

50. 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