PHY 102 CBT PRACTICE

1. 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 ?

2. Mass of Proton equals ______

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

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

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

6. 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

7. 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

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

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

10. Copy - The unit of Electric flux is ____

11. Electric dipole moment p is described as ____

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

13. 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

14. 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 _____

15. 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

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

17. Charge is denoted as ____

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

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

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

21. 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?

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

23. 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?

24. Factors affecting capacitance include all except ___

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

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

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

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

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

30. All of these are type of resistors except ____

31. Electric current is measured using a device called ____

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

33. 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

34. 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

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

36. 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 ?

37. 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 _____

38. _____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

39. 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?

40. The unit of Electric flux is ____

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

42. Protons have magnitudes of charge ____

43. 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?

44. 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 ?

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

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

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

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

49. 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 ?

50. All of these are properties of conductors except ____