ATTENTION:
Kindly note that you will be presented with 50 questions randomized from the NOUN question bank. Make sure to take the quiz multiple times so you can get familiar with the questions and answers, as new questions are randomized in each attempt.
Good luck!
PHY102
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1. When amber is rubbed with fur
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2. Which of the following is a conductor
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3. A voltmeter connected across a 60Hz ac source reads 240V. Write down the expression of the instanteneous voltage as a function of time.
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4. A region where an electric charge experiences a force is ---------------------------field
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5. The term 'lost volts' refers to -----------
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6. The energy stored in a system of charges is known as electrostatic potential ---------------------------
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7. 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?
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8. Find the force on a charge 2C in a field 1Vm<sup>-1</sup>---------------------------
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9. For capacitors in parallel, the potential difference across each capacitor is ---------------------------
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10. For capacitors connected in series each has the same ____________.
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11. The magnitude and direction of the earth's field varies with position over the --------------------------- surface.
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12. A galvanometer of resistance $120Omega$ a full scale deflection with a current of 0.0005A. How would you convert it to an ammeter that reads a maximum current of 5A?
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13. A negative charge ---------------------------negative charge
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14. The half-life of a certain radioactive isotope is 32 hours. What fraction of the sample would remain after 16 hours?
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15. 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.
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16. Property of magnetic material in which --------------------------- attracts or repels.
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17. 1eV is the energy acquired by an electron in falling freely through --------------------------- 1volt.
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18. Electric charge between two bodies can be produced by ---------------------------
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19. What are the dimensions of the constant k in Coulomb’s law of electrostatics?
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20. If the steady current in a wire is coming directly toward you, the magnetic field lines
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21. 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?
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22. The variation of the compass from the north-south direction is called the ---------------------------
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23. From Gauss’ law which of the following is NOT correct?
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24. An electric field of 50 kV/m is perpendicular to a magnetic field 0.25 T. What is the velocity of a charge whose initial of motion is perpendicular to both fields and which passes through the fields undeflected?
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25. The following are true about electric field lines except that they ______
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26. A magnetic field does not exert a force on a _________
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27. As charge increases, electric flux density ---------------------------
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28. The --------------------------- is the SI Unit of electric charge
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29. 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}
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30. The study of static charges is called ---------------------------
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31. In the method of charging by friction, The algebraic sum of the individual charges that is the net charge is ---------------------------.
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32. Electric flux density is a function of ---------------------------
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33. 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?
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34. An alpha particle is a --------------------------- nucleus consisting of 2 protons and 2 neutrons.
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35. At the _______ a dipping compass needle is horizontal and at the magnetic poles it is vertical.
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36. 1 volt is equal to ________
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37. A body that absorbs all radiations falling on it is known as ---------------------------.
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38. 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 $Q_{2}$
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39. The electric flux is a --------------------------- quantity.
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40. Kirchhof's loop rule is statement of conservation of __________
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41. A single turn coil of cross-sectional area $7.2cm^2$ is in the a magnetic field of flux desity 0.45T. The field which is perpendicular to the coil, is steadily reduced to 0.0T in 5s. Calculate the induced emf.
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42. Gaussian surface is an imaginary closed ---------------------------
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43. Which of the following can be used to charge a metal rod that si held in your hand? Rub it with ______
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44. When an atom is in the ground state it is said to be ---------------------------
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45. According to ohm's law the potential difference is proportional to the ---------------------------
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46. The force applied to a conductor is 10N if the charge in the conductor is 5C, what is the electric field intensity?
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47. The magnitude of the forces between charged spheres was first investigated by Charles ---------------------------
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48. A positively charged object repels
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49. An ammeter is suspected of giving inaccurate readings. In order to confirm the readings, the ammeter is connected to a silver votltameter in series and a steady current is passed for one hour. The ammeter reads 0.56A and 2.0124g of silver is deposited. What is the error is the ammeter reading?
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50. The direction of the electric field is opposite to that of the force if the charge is ---------------------------
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