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. Electric flux density is a function of ---------------------------
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2. From Gauss’ law which of the following is NOT correct?
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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 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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5. A magnetic field does not exert a force on a _________
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6. Find the current in through the $0.3Omega$ in the circuit shown
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7. A body that absorbs all radiations falling on it is known as ---------------------------.
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8. Property of magnetic material in which --------------------------- attracts or repels.
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9. The variation of the compass from the north-south direction is called the ---------------------------
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10. 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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11. Gauss's law applies to any hypothetical closed surface called --------------------------- surface.
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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?
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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. 1eV is the energy acquired by an electron in falling freely through --------------------------- 1volt.
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15. When amber is rubbed with fur
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16. For capacitors in parallel, the potential difference across each capacitor is ---------------------------
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17. 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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18. An alpha particle is a --------------------------- nucleus consisting of 2 protons and 2 neutrons.
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19. 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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20. 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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21. 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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22. The magnetic North is found by suspending a bar magnet freely on the --------------------------- axis.
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23. 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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24. 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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25. <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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26. 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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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 $Q_{2}$
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28. When an atom is in the ground state it is said to be ---------------------------
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29. 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
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30. The force that is responsible for holding electrons to nuclei to form atoms is called the --------------------------- force
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31. As charge increases, electric flux density ---------------------------
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32. 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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33. 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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34. 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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35. 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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36. A region where an electric charge experiences a force is ---------------------------field
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37. 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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38. The minimum energy required to liberate an electron from a metal surface is called ---------------------------.
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39. Kirchhof's junction rule is statement of conservation of -----------
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40. The study of static charges is called ---------------------------
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41. 1 volt is equal to ________
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42. Kirchhof's loop rule is statement of conservation of __________
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43. 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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44. The magnitude and direction of the earth's field varies with position over the --------------------------- surface.
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45. Neutral objects constitute of equal ---------------------------
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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. For capacitors in parallel, the potential difference across each capacitor is ---------------------------
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48. In the method of charging by friction, The algebraic sum of the individual charges that is the net charge is ---------------------------.
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49. 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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50. For capacitors connected in series each has the same ____________.
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