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. For capacitors connected in series each has the same ____________.
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2. <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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3. 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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4. 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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5. The principle that electric forces add vectorially is known as the principle of ---------------------------
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6. 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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7. The surface integral of the electric field E over a surface is defined to be electric ---------------------------
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8. A negative charge ---------------------------negative charge
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9. 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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10. Electric flux density is a function of ---------------------------
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11. 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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12. 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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13. Which of the following is not true about the electric field intensity $vec{E}$ of a uniformly charged solid sphere?
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14. Property of magnetic material in which --------------------------- attracts or repels.
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15. 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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16. A magnetic field does not exert a force on a _________
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17. 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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18. 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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19. A positively charged object repels
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20. 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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21. The --------------------------- is the SI Unit of electric charge
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22. Kirchhof's junction rule is statement of conservation of -----------
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23. 1 volt is equal to ________
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24. 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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25. What is the self - inductance of an air-core solenoid, 1m long and 0.05m in diameter, if it has 1400 turns?
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26. 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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27. 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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28. 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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29. When amber is rubbed with fur
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30. 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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31. When a dielectric material is inserted between the plates of a capacitor it increases its ---------------------------
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32. 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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33. According to Faraday's law, the magnitude of the induced e.m.f is proportional to the rate of change of --------------------------- linking the circuit.
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34. For capacitors in parallel, the potential difference across each capacitor is ---------------------------
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35. The magnitude of the forces between charged spheres was first investigated by Charles ---------------------------
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36. Gauss's law applies to any hypothetical closed surface called --------------------------- surface.
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37. 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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38. From Gauss’ law which of the following is NOT correct?
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39. 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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40. Find the force on a charge 2C in a field 1Vm<sup>-1</sup>---------------------------
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41. The study of static charges is called ---------------------------
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42. An ac circuit consists of a voltage source $v = 200sin120pi{t}$ and a $6mu$F capacitor in series. Calculate the current established in the circuit
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43. In the space surrounding a wire carrying a steady current, there exists ________
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44. Field lines are drawn such that the lines per unit cross-section area is proportional to ---------------------------field.
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45. An alpha particle is a --------------------------- nucleus consisting of 2 protons and 2 neutrons.
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46. As charge increases, electric flux density ---------------------------
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47. A potentiometer wire of length 100cm has a resistance of 10$Omega$. It is connected in series to to a resistance R and a cell of emf 2V and negligible internal resistance. A source of emf of 10mV is balanced by a length of 40cm of the potentiometer wire. What is the value of the resistance R?
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48. The variation of the compass from the north-south direction is called the ---------------------------
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49. In the cathode ray oscilloscope, when fast moving electrons strike the glass screen coated with zinc and sulphide they cause ---------------------------.
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50. 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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