PHY102

1. The force between electric charges is known as ---------------------------

2. When a copper surface is illuminated by radiation of wavelength 2537 angstrome units the value of the stopping potential is found to be 0.24volts. Calculate the work function of copper.

3. A uniform electric field of 200 N/C is in the x-direction. A point charge of 3mu{C} is released from rest at the origin. What is the kinetic energy of the charge when it is at x = 4 m?

4. For capacitors connected in series each has the same ____________.

5.  A rectangular coil of dimensions 20 cm by 15 cm lies with its plane parallel to a magnetic field of $ 0.5 W/$m^{2}$. The coil, carrying a current of 10 A experiences a torque of 4.5 Nm in the field. How many loops has the coil?

6.  Which of the following can be used to charge a metal rod that si held in your hand? Rub it with ______

7. At the _______ a dipping compass needle is horizontal and at the magnetic poles it is vertical.

8. For capacitors in parallel, the potential difference across each capacitor is ---------------------------

9. Find the force on a charge 2C in a field 1Vm^-1---------------------------

10.  In the space surrounding a wire carrying a steady current, there exists ________

11. As charge increases, electric flux density ­---------------------------

12.  A spectral line is emitted when an atom undergoes transition between two levels with a difference in energy of 2.4eV. What is the wavelength of the line?

13. The --------------------------- is the SI Unit of electric charge

14. Neutral objects constitute of equal ---------------------------

15. When an atom is in the ground state it is said to be ---------------------------

16. In the method of charging by friction, The algebraic sum of the individual charges that is the net charge is ---------------------------.

17. The minimum energy required to liberate an electron from a metal surface is called ---------------------------.

18. When a dielectric material is inserted between the plates of a capacitor it increases its ---------------------------

19. In the cathode ray oscilloscope, when fast moving electrons strike the glass screen coated with zinc and sulphide they cause ---------------------------.

20.  Which of the following is not true about the electric field intensity $vec{E}$ of a uniformly charged solid sphere?

21. The study of static charges is called ---------------------------

22. An RLC circuit is used to tune a radio set to receive NOUN RADIO broadcasting at 105.9MHz in the FM band. The resistance and the inductance of the circuit of the radio set are $12Omega$ and 1.4$mu$H respectively. What capacitance should the circuit have?

23.  Find the current in through the $0.3Omega$ in the circuit shown

24. A body that absorbs all radiations falling on it is known as ---------------------------.

25. Electric flux density is a function of ---------------------------

26.  Which of the following is a conductor

27.  Two charges $Q_{1} = 500mu{C}$ and $Q_{2} = 100mu{C}$ are located on the XY plane at the positions $r_{1} = 3vec{j} m and r_{2} = 4vec{i}$ m. Find the force exerted on the $Q_{2}$

28. The magnitude of the forces between charged spheres was first investigated by Charles ---------------------------

29. The direction of the electric field is opposite to that of the force if the charge is ---------------------------

30. Electric charge between two bodies can be produced by ---------------------------

31. 1eV is the energy acquired by an electron in falling freely through --------------------------- 1volt.

32.  The electric potential difference between two points A and B is 42 V. What is the work done by an external agent in carrying a charge of 5.0$times 10^{-5}$ C from A to B at constant speed?

33.  A series circuit consisting of an uncharged $42mu$F capacitor and $10 MOmegaega$ resistor is connected to 100V power source. What are the current in the circuit and the charge on the capacitor after one time constant?

34.  What are the dimensions of the constant k in Coulomb’s law of electrostatics?

35. A positive ion passes through an electric and magnetic fields which are mutually perpendicular. The electric field strength is 20.0kV/m while the magnetic flux density is 0.40T. At what speed will the ion pass through undeflected?

36. Whose law is employed in electrostatics ­­?

37. The magnetic North is found by suspending a bar magnet freely on the --------------------------- axis.

38. For capacitors in parallel, the potential difference across each capacitor is ---------------------------

39. An alpha particle is a --------------------------- nucleus consisting of 2 protons and 2 neutrons.

40. <p style="text-align:left">Six equal point charges Q = 10nC are located at 2,3, 4,5,6,7m. Find the potential at origin.

41.  The term 'lost volts' refers to -----------

42. Electric field is measured in Newton per ---------------------------.

43.  An electron enters a uniform magnetic field 0.20 T at an angle of $30^{o}$ the field. Determine the pitch of the helical path assuming its speed is $3times10^{7}$ m/s

44. The principle that electric forces add vectorially is known as the principle of ---------------------------

45.  Kirchhof's loop rule is statement of conservation of __________

46.  A magnetic field does not exert a force on a _________

47. Charges of ${+}2$ C and ${-2}$ C are situated at points P and Q respectively which are at a distance apart. A point X is mid-way between P and Q. Which of the following correctly describes the electric field and the electric potential at point X?

48. A negative charge ---------------------------negative charge

49.  Two identical balls balls P and Q, each of mass 0.20 g, carry identical charges and are suspended by two threads of equal length. The balls position themselves at equilibrium such that the angle between the threads is 60_{o}.If the distance between the the balls is 0.5m, find the charge on each of them. Take g = 9.8 m/s^{2}

50. When a charge density depends only on the perpendicular distance from a plane, the charge distribution is said to have--------------------------- symmetry.