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. 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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2. Neutral objects constitute of equal ---------------------------
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3. The direction of the electric field is opposite to that of the force if the charge is ---------------------------
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4. The following are true about electric field lines except that they ______
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5. Kirchhof's junction rule is statement of conservation of -----------
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6. 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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7. The --------------------------- number is the total number of neutrons and protons.
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8. The electric flux is a --------------------------- quantity.
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9. For capacitors connected in series each has the same ____________.
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10. 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?
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11. Property of magnetic material in which --------------------------- attracts or repels.
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12. The variation of the compass from the north-south direction is called the ---------------------------
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13. 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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14. 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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15. For capacitors in parallel, the potential difference across each capacitor is ---------------------------
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16. 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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17. 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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18. A region where an electric charge experiences a force is ---------------------------field
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19. Whose law is employed in electrostatics ?
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20. As charge increases, electric flux density ---------------------------
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21. 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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22. 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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23. 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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24. 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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25. Gauss's law applies to any hypothetical closed surface called --------------------------- surface.
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26. The magnitude of the forces between charged spheres was first investigated by Charles ---------------------------
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27. 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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28. Electric field is measured in Newton per ---------------------------.
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29. The principle that electric forces add vectorially is known as the principle of ---------------------------
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30. An alpha particle is a --------------------------- nucleus consisting of 2 protons and 2 neutrons.
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31. Which of the following is not true of an electrostatic force?
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32. 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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33. 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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34. At the _______ a dipping compass needle is horizontal and at the magnetic poles it is vertical.
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35. 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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36. The surface integral of the electric field E over a surface is defined to be electric ---------------------------
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37. The magnetic North is found by suspending a bar magnet freely on the --------------------------- axis.
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38. When beta decay occurs --------------------------- changes into a proton and electron.
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39. Field lines are drawn such that the lines per unit cross-section area is proportional to ---------------------------field.
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40. A magnetic field does not exert a force on a _________
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41. The work done in taking a unit positive charge from one point to another in electric field is --------------------------- of the path chosen between the two points.
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42. Electric flux density is a function of ---------------------------
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43. The minimum energy required to liberate an electron from a metal surface is called ---------------------------.
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44. According to ohm's law the potential difference is proportional to the ---------------------------
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45. 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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46. 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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47. A proton is accelerated through a potential difference of 100V and the enters a region in which it is moving perpendicular to a magnetic field of flux density 0.20 T. Find the radius of the circular path in which it will travel.
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48. 1eV is the energy acquired by an electron in falling freely through --------------------------- 1volt.
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49. The magnitude and direction of the earth's field varies with position over the --------------------------- surface.
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50. A tiny ball of mass 0.60 g is suspended from a rigid support with a piece of thread in a horizontal electric field of intensity 700 N/C. The ball is in equilibrium when the thread is inclined at an angle of 20_{o} to the vertical. What are the magnitude and sign of the charge on the ball? Take g = 9.8m/s^{2}
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