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. The force between electric charges is known as ---------------------------
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2. 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?
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3. The following are true about electric field lines except that they ______
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4. When a charge density depends only on the perpendicular distance from a plane, the charge distribution is said to have--------------------------- symmetry.
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5. The surface integral of the electric field E over a surface is defined to be electric ---------------------------
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6. In the circuit shown, each of the cells has an emf of 2V and internal resistance of $0.1Omega$. Find the current in through the $0.5Omega$
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7. 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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8. 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?
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9. A negative charge ---------------------------negative charge
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10. Neutral objects constitute of equal ---------------------------
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11. 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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12. An RLC circiut contains an ac voltage source with rms value of 50V and has a frequency of 600Hz. Suppose that a resistance R = 20 $Omega$, capacitance C = 10.0 $mu$F and an inductance L = 4.0mH are connected in series to the source. Find the current in the circuit and the voltmeter reading across the inductor.
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13. Which of the following is a conductor
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14. A region where an electric charge experiences a force is ---------------------------field
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15. Whose law is employed in electrostatics ?
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16. <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.
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17. What are the dimensions of the constant k in Coulomb’s law of electrostatics?
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18. A positively charged object repels
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19. 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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20. A magnetic field does not exert a force on a _________
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21. Calculate the electric field at distance of 320 cm from an infinitely long wire carrying a charge per unit length 8.3 C/m.
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22. The direction of the electric field is opposite to that of the force if the charge is ---------------------------
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23. The energy stored in a system of charges is known as electrostatic potential ---------------------------
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24. Three point charges $$2mu{C$}, ${-}4mu{C}$$, and $$6mu{C}$$ are held at the corners of an equilateral triangle with sides equal to 3 cm.What is the resultant force in newtons on the $$2mu{C}$$ charge?
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25. An alpha particle is a --------------------------- nucleus consisting of 2 protons and 2 neutrons.
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26. 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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27. According to ohm's law the potential difference is proportional to the ---------------------------
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28. At the _______ a dipping compass needle is horizontal and at the magnetic poles it is vertical.
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29. A body that absorbs all radiations falling on it is known as ---------------------------.
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30. As charge increases, electric flux density ---------------------------
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31. The potential difference between two points B and A is equal to the --------------------------- in taking a unit positive charge from A to B.
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32. 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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33. The principle that electric forces add vectorially is known as the principle of ---------------------------
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34. The magnitude and direction of the earth's field varies with position over the --------------------------- surface.
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35. The --------------------------- number is the total number of neutrons and protons.
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36. The work function of a metal is 3.45eV. Calculate th maximum wavelength of a photon that can eject photo-electrons from the metal
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37. An air-cored transformer is assumed to be 100% efficient. The ratio of the secondary turns to the primary turns is 1:20. A 240V ac supply is connected to the primary coil and a $6Omega$ load is connected to the secondary coil. what is the current in the primary coil?
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38. Field lines are drawn such that the lines per unit cross-section area is proportional to ---------------------------field.
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39. A huge spark due to electric discharge in the atmosphere produces all of the following except ______
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40. Potential difference is the work done in moving a unit charge ____ from one point to another in an electric field.
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41. 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?
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42. When amber is rubbed with fur
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43. A conductor 2cm long carrying a current of 8A lies at right angles to a magnetic field of which the flux density is 1.0T. Calculate the force exerted on the conductor
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44. A charge distribution in which the charge density at any point depends only on the distance of the point from a central point and not on the direction is said to be spherically ---------------------------
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45. 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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46. Which of the following is not true of an electrostatic force?
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47. The magnetic flux through each loop of a 35-loop coil is given by $(3.6t-0.71t^{3})times10^{-2}Tm^{2}$, where the time is in seconds. Determine the induced emf at t=5.0s.
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48. The minimum energy required to liberate an electron from a metal surface is called ---------------------------.
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49. 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?
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50. The term 'lost volts' refers to -----------
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