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 space surrounding a wire carrying a steady current, there exists ________
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2. The minimum energy required to liberate an electron from a metal surface is called ---------------------------.
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3. 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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4. At the _______ a dipping compass needle is horizontal and at the magnetic poles it is vertical.
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5. 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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6. 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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7. 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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8. 1eV is the energy acquired by an electron in falling freely through --------------------------- 1volt.
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9. 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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10. For capacitors in parallel, the potential difference across each capacitor is ---------------------------
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11. When amber is rubbed with fur
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12. The force that is responsible for holding electrons to nuclei to form atoms is called the --------------------------- force
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13. A huge spark due to electric discharge in the atmosphere produces all of the following except ______
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14. 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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15. The magnitude and direction of the earth's field varies with position over the --------------------------- surface.
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16. A body that absorbs all radiations falling on it is known as ---------------------------.
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17. According to ohm's law the potential difference is proportional to the ---------------------------
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18. Field lines are drawn such that the lines per unit cross-section area is proportional to ---------------------------field.
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19. Property of magnetic material in which --------------------------- attracts or repels.
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20. Whose law is employed in electrostatics ?
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21. 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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22. From Gauss’ law which of the following is NOT correct?
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23. Electric charge between two bodies can be produced by ---------------------------
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24. The principle that electric forces add vectorially is known as the principle of ---------------------------
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25. A negative charge ---------------------------negative charge
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26. When beta decay occurs --------------------------- changes into a proton and electron.
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27. The term 'lost volts' refers to -----------
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28. When an atom is in the ground state it is said to be ---------------------------
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29. 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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30. Gauss's law applies to any hypothetical closed surface called --------------------------- surface.
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31. 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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32. 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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33. If the steady current in a wire is coming directly toward you, the magnetic field lines
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34. 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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35. For how long must a steady current of 2A flow through a copper voltameter to deposit $10^{-3}$kg of copper? Z for coper is 0.000329g/C
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36. A magnetic field does not exert a force on a _________
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37. A region where an electric charge experiences a force is ---------------------------field
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38. The surface integral of the electric field E over a surface is defined to be electric ---------------------------
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39. Which of the following is not true about the electric field intensity $vec{E}$ of a uniformly charged solid sphere?
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40. 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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41. The study of static charges is called ---------------------------
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42. The electric flux is a --------------------------- quantity.
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43. 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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44. The direction of the electric field is opposite to that of the force if the charge is ---------------------------
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45. What are the dimensions of the constant k in Coulomb’s law of electrostatics?
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46. 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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47. 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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48. In the cathode ray oscilloscope, when fast moving electrons strike the glass screen coated with zinc and sulphide they cause ---------------------------.
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49. Kirchhof's loop rule is statement of conservation of __________
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50. The resistivity of a semiconductor decreases rapidly with increasing ---------------------------.
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