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. As charge increases, electric flux density ---------------------------
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2. Gauss's law applies to any hypothetical closed surface called --------------------------- surface.
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3. 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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4. A positively charged object repels
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5. If the steady current in a wire is coming directly toward you, the magnetic field lines
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6. For capacitors in parallel, the potential difference across each capacitor is ---------------------------
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7. The following are true about electric field lines except that they ______
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8. Kirchhof's junction rule is statement of conservation of -----------
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9. 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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10. 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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11. 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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12. The magnitude and direction of the earth's field varies with position over the --------------------------- surface.
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13. Which of the following is a conductor
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14. The direction of the electric field is opposite to that of the force if the charge is ---------------------------
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15. 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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16. The electric flux is a --------------------------- quantity.
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17. A huge spark due to electric discharge in the atmosphere produces all of the following except ______
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18. The term 'lost volts' refers to -----------
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19. 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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20. 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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21. An alpha particle is a --------------------------- nucleus consisting of 2 protons and 2 neutrons.
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22. 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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23. When amber is rubbed with fur
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24. In the space surrounding a wire carrying a steady current, there exists ________
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25. The minimum energy required to liberate an electron from a metal surface is called ---------------------------.
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26. 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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27. 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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28. The energy stored in a system of charges is known as electrostatic potential ---------------------------
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29. The --------------------------- is the SI Unit of electric charge
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30. Which of the following is not true of an electrostatic force?
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31. 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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32. What are the dimensions of the constant k in Coulomb’s law of electrostatics?
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33. 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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34. A body that absorbs all radiations falling on it is known as ---------------------------.
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35. From Gauss’ law which of the following is NOT correct?
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36. A negative charge ---------------------------negative charge
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37. The surface integral of the electric field E over a surface is defined to be electric ---------------------------
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38. Whose law is employed in electrostatics ?
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39. 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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40. The force that is responsible for holding electrons to nuclei to form atoms is called the --------------------------- force
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41. Find the force on a charge 2C in a field 1Vm<sup>-1</sup>---------------------------
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42. 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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43. The resistivity of a semiconductor decreases rapidly with increasing ---------------------------.
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44. According to ohm's law the potential difference is proportional to the ---------------------------
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45. Kirchhof's loop rule is statement of conservation of __________
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46. The magnetic North is found by suspending a bar magnet freely on the --------------------------- axis.
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47. In the method of charging by friction, The algebraic sum of the individual charges that is the net charge is ---------------------------.
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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. 1eV is the energy acquired by an electron in falling freely through --------------------------- 1volt.
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50. A magnetic field does not exert a force on a _________
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